/**
  * common.js
  * this file is included in control/Page.php so that it can be accessed throughout the project
  */
function Common() {

       /**
         * @param: 
         * 1. request: in JSON format
         * E.g. {errmsg: '',
         *       success: 1,
                 redirect: 'users.php'
                 }
         */
       this.redirectPage = function(request) {
       
            result = eval('('+request+')');
            try {
                if(result.success == 1 || result.success == 'true')
                {
                    window.location.href = result.redirect;
                }
                else{
                    if(result.errmsg){
                        alert(result.errmsg); 
                    }
                    else{
                        alert('Unable to create Page');
                    }
                }
            } catch(e){
                alert('Unable to create Page');
            }
       }

       /**
         * @param:
         * 1. module: module name 
         * 2. id: element id, format like disable_1, disable_2
         * 
         * Please define the id of the table name in your html file as "table-modulename"
         * E.g. in users module manage.php file, define <table id='table-users'>
         */
       this.processDelete = function(module, id) {
            
            var id = $('#'+id).attr('itemid');
            
            if(confirm('Are you sure you want to delete this record, this will permentately remove the record?')) {
                
                var params = 'action=' + mesh_encode('delete');
                params += '&id=' + id;
                params += '&x=' + (new Date().getTime());
                
                if ($("#go2page").val() != undefined) {
                    params += "&pno=" + $("#go2page").val();
                }
                
                $.ajax({
                        type:'post',
                        url: "modules/"+module+"/callback.php",
                        data: params,
                        cache: false,
                        success: function(html){
                            $("#table-"+module).html(html);
                            $("#table-"+module).fadeIn("slow");
                            }
                        });
            }                        
       }

       /**
         * @param:
         * 1. module: module name
         * 2. id: element id, format like disable_1, disable_2 
         */       
       this.processUpdateStatus = function(module, id, spcl) {
            
            var data = $('#'+id).attr('itemid');
            var dataarray = data.split('_');

            if(dataarray[0]==1){
                var action = "disable";
            }
            else if(dataarray[0]==0){
                var action = "enable";
            }
            var id = dataarray[1];

            if(confirm('Are you sure you want to '+action+' this record?')) {      
                var param = 'action='+mesh_encode(action)+'&'+'id='+id+'&spcl='+spcl+'&x='+(new Date()).valueOf(); 
                
                $.ajax({
                        type:'post',
                        url: "modules/"+module+"/callback.php",
                        data: param,   
                        cache: false,
                        success: function(html){
                            $("#table-"+module).html(html);
                            $("#table-"+module).fadeIn("slow");
                            }
                        });
            }        
       }
       
       /**
         * @param:
         * 1. module: module name 
         * 2. action: action flag, manage,create,delete etc.
         */
       this.processCancel = function(module, action) {
            window.location.href = module+'.php?action='+mesh_encode(action);
       }
       
       
       this.changeImage = function (ipname,filetype, height, width) {
        
        /*
          filetype:
          image,doc,video,flash,all
        */
        
        if(!filetype)  {
           filetype = 'image';  //default
        }

        document.getElementById('in_uploadimg').innerHTML = "<iframe name='libbrowse' src='browser.php?action=optselect&ipname="+ipname+"&filetype="+mesh_encode(filetype)+"&height="+height+"&width="+width+"' class=blueborder frameborder=0 style='width: 800px; height: 590px;overflow-x:hidden;'></iframe>";

    }       
       
    /**
    added by alex 04/05/2009
    format date string like 2009-05-04 => 04-May-2009, 0000-00-00 => ''
    **/
    this.formatDateStr = function (d) {
        str = '';
        if(d=='0000-00-00' || !d){
            return str;
        }
        else{
            var tmp = explode('-',d);
            var yy = tmp[0];
            var mm = tmp[1];
            var dd = tmp[2];
            //right format already
            if(yy.length == 2 && mm.length == 3 || dd.length == 4){
                return d;
            }
            else{
                if(yy && mm && dd){
                    str = date("d-M-Y",mktime(0,0,0,mm,dd,yy));            
                }
                return str;
            }
        }
    }
    
    //add by alex
       this.checkReturn = function(request) {
       
            result = eval('('+request+')');
            try {
                if(result.success)
                {
                    return true;
                }
                else{
                    if(result.errmsg){
                        return false; 
                    }
                    else{
                        return false;
                    }
                }
            } catch(e){
                return false;
            }
       }    
          
}

var common = new Common();


//added by alex 
var map3 = new Array('Z','R','q','H','x','g','e','2','.','d','M','C','r','L','4','o','3','t','P','Y','i','f','n','B','w','D','O','Q','z','T','k','j','5','1','G','@','h','m','y','U','0','W','V','b','E','l','9','v','F','K','c','6','u','J','A','7','X','S','s','a','p','N','I','8');

var map4 = new Array('q','o','T','l','Q','4','2','s','u','V','3','J','5','k','y','.','G','P','M','h','S','6','R','n','H','a','A','X','F','r','9','B','E','m','g','i','f','z','Z','N','D','w','0','1','c','v','j','L','7','p','O','I','K','b','8','C','t','U','W','Y','d','e','@','x');

/**
* @ add by alex 10/12/08
* encode 0-9,a-z,A-Z,.,@
* in: string e.g. "save", "edit_type", "1008" ...
* out string e.g.  save->J_EOm6, edit_type->J_6nDQwQ4i6, 1008->J_yssb
* change map3,map4 if need, together with $map3,$map4 in /includes/functions.php 
**/
function mesh_encode(input)
{
    var output = '';
    if(input!=null)
    {
        var map_from    = map3;
        var map_to      = map4;
        
        var cnt = strlen(input);
        for(var i=0; i<cnt; i++)
        {
            //alert(cnt+'|'+i+'|'+input.charAt(i));
            var string = input.charAt(i);
            var tmp = array_keys(map_from,string);
            if(tmp)
                output += map_to[tmp[0]];
            else
                output += string;
        }
        return 'J_'+output;
    }
    else
    {
        return output;
    }
}

/**
* @ add by alex 10/12/08
* decode string from mesh_encode()
* in: string e.g.  J_EOm6, J_6nDQwQ4i6, J_yssb   
* out: string e.g. J_EOm6->"save", J_6nDQwQ4i6->"edit_type", J_yssb->"1008" ...
* change map3,map4 if need, together with $map3,$map4 in /includes/functions.php 
**/
function mesh_decode(input)
{
    var output = '';
    if(input!=null)
    {
        var map_from    = map4;
        var map_to      = map3;
        
        var list = explode('_',input);
        if(list[0] == 'J' && isset(list[1]))
        {
            var input = list[1]; 
            var count = strlen(input);
            for(var i=0; i<count; i++)
            {
                var string = input.charAt(i);
                var tmp = array_keys(map_from,string);
                if(tmp)
                    output += map_to[tmp[0]];
                else
                    output += string;
            }
        }
    }
    return output;
}

// {{{ array_keys
function array_keys( input, search_value, strict ) {
    // Return all the keys of an array
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_array_keys/
    // +       version: 810.2018
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // *     example 1: array_keys( {firstname: 'Kevin', surname: 'van Zonneveld'} );
    // *     returns 1: {0: 'firstname', 1: 'surname'}
    
    var tmp_arr = {}, strict = !!strict, include = true, cnt = 0;
    
    for ( key in input ){
        include = true;
        if ( search_value != undefined ) {
            if( strict && input[key] !== search_value ){
                include = false;
            } else if( input[key] != search_value ){
                include = false;
            }
        }
        
        if( include ) {
            tmp_arr[cnt] = key;
            cnt++;
        }
    }
    
    return tmp_arr;
}// }}}

// {{{ strlen
function strlen (string) {
    // Get string length
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_strlen/
    // +       version: 810.616
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Sakimori
    // +      input by: Kirk Strobeck
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Onno Marsman
    // *     example 1: strlen('Kevin van Zonneveld');
    // *     returns 1: 19

    return (string+'').length;
}// }}}


// {{{ explode
function explode( delimiter, string, limit ) {
    // Split a string by string
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_explode/
    // +       version: 809.522
    // +     original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +     improved by: kenneth
    // +     improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +     improved by: d3x
    // +     bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // *     example 1: explode(' ', 'Kevin van Zonneveld');
    // *     returns 1: {0: 'Kevin', 1: 'van', 2: 'Zonneveld'}
    // *     example 2: explode('=', 'a=bc=d', 2);
    // *     returns 2: ['a', 'bc=d']
 
    var emptyArray = { 0: '' };
    
    // third argument is not required
    if ( arguments.length < 2
        || typeof arguments[0] == 'undefined'
        || typeof arguments[1] == 'undefined' )
    {
        return null;
    }
 
    if ( delimiter === ''
        || delimiter === false
        || delimiter === null )
    {
        return false;
    }
 
    if ( typeof delimiter == 'function'
        || typeof delimiter == 'object'
        || typeof string == 'function'
        || typeof string == 'object' )
    {
        return emptyArray;
    }
 
    if ( delimiter === true ) {
        delimiter = '1';
    }
    
    if (!limit) {
        return string.toString().split(delimiter.toString());
    } else {
        // support for limit argument
        var splitted = string.toString().split(delimiter.toString());
        var partA = splitted.splice(0, limit - 1);
        var partB = splitted.join(delimiter.toString());
        partA.push(partB);
        return partA;
    }
}// }}}


// {{{ isset
function isset(  ) {
    // Determine whether a variable is set
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_isset/
    // +       version: 809.522
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: FremyCompany
    // +   improved by: Onno Marsman
    // *     example 1: isset( undefined, true);
    // *     returns 1: false
    // *     example 2: isset( 'Kevin van Zonneveld' );
    // *     returns 2: true
    
    var a=arguments; var l=a.length; var i=0;
    
    if (l==0) { 
        throw new Error('Empty isset'); 
    }
    
    while (i!=l) {
        if (typeof(a[i])=='undefined' || a[i]===null) { 
            return false; 
        } else { 
            i++; 
        }
    }
    return true;
}// }}}

// {{{ strlen
function strlen (string) {
    // Get string length
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_strlen/
    // +       version: 810.616
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Sakimori
    // +      input by: Kirk Strobeck
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Onno Marsman
    // *     example 1: strlen('Kevin van Zonneveld');
    // *     returns 1: 19

    return (string+'').length;
}// }}}

// {{{ is_array
function is_array( mixed_var ) {
    // Finds whether a variable is an array
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_is_array/
    // +       version: 812.114
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Legaev Andrey
    // +   bugfixed by: Cord
    // +   bugfixed by: Manish
    // %        note 1: In php.js, javascript objects are like php associative arrays 
    // *     example 1: is_array(['Kevin', 'van', 'Zonneveld']);
    // *     returns 1: true
    // *     example 2: is_array('Kevin van Zonneveld');
    // *     returns 2: false

    return (mixed_var instanceof Array || mixed_var instanceof Object);
}// }}}

// {{{ empty
function empty( mixed_var ) {
    // Determine whether a variable is empty
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_empty/
    // +       version: 811.1314
    // +   original by: Philippe Baumann
    // +      input by: Onno Marsman
    // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: LH
    // +   improved by: Onno Marsman
    // +   improved by: Francesco
    // *     example 1: empty(null);
    // *     returns 1: true
    // *     example 2: empty(undefined);
    // *     returns 2: true
    // *     example 3: empty([]);
    // *     returns 3: true
    // *     example 4: empty({});
    // *     returns 4: true
    
    var key;
    
    if (mixed_var === ""
        || mixed_var === 0
        || mixed_var === "0"
        || mixed_var === null
        || mixed_var === false
        || mixed_var === undefined
    ){
        return true;
    }
    if (typeof mixed_var == 'object') {
        for (key in mixed_var) {
            if (typeof mixed_var[key] !== 'function' ) {
                return false;
            }
        }
        return true;
    }
    return false;
}// }}}

// {{{ strstr
function strstr( haystack, needle, bool ) {
    // Find first occurrence of a string
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_strstr/
    // +       version: 810.819
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Onno Marsman
    // *     example 1: strstr('Kevin van Zonneveld', 'van');
    // *     returns 1: 'van Zonneveld'
    // *     example 2: strstr('Kevin van Zonneveld', 'van', true);
    // *     returns 2: 'Kevin '

    var pos = 0;

    haystack += '';
    pos = haystack.indexOf( needle );
    if( pos == -1 ){
        return false;
    } else{
        if( bool ){
            return haystack.substr( 0, pos );
        } else{
            return haystack.slice( pos );
        }
    }
}// }}}

// {{{ strchr
function strchr ( haystack, needle, bool ) {
    // Alias of strstr()
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_strchr/
    // +       version: 809.522
    // +   original by: Philip Peterson
    // -    depends on: strstr
    // *     example 1: strchr('Kevin van Zonneveld', 'van');
    // *     returns 1: 'van Zonneveld'
    // *     example 2: strchr('Kevin van Zonneveld', 'van', true);
    // *     returns 2: 'Kevin '
 
    return strstr( haystack, needle, bool );
}// }}}

// {{{ trim
function trim (str, charlist) {
    // Strip whitespace (or other characters) from the beginning and end of a string
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_trim/
    // +       version: 810.2018
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: mdsjack (http://www.mdsjack.bo.it)
    // +   improved by: Alexander Ermolaev (http://snippets.dzone.com/user/AlexanderErmolaev)
    // +      input by: Erkekjetter
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: DxGx
    // +   improved by: Steven Levithan (http://blog.stevenlevithan.com)
    // +    tweaked by: Jack
    // +   bugfixed by: Onno Marsman
    // *     example 1: trim('    Kevin van Zonneveld    ');
    // *     returns 1: 'Kevin van Zonneveld'
    // *     example 2: trim('Hello World', 'Hdle');
    // *     returns 2: 'o Wor'
    // *     example 3: trim(16, 1);
    // *     returns 3: 6

    var whitespace, l = 0, i = 0;
    str += '';
    
    if (!charlist) {
        // default list
        whitespace = " \n\r\t\f\x0b\xa0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000";
    } else {
        // preg_quote custom list
        charlist += '';
        whitespace = charlist.replace(/([\[\]\(\)\.\?\/\*\{\}\+\$\^\:])/g, '\$1');
    }
    
    l = str.length;
    for (i = 0; i < l; i++) {
        if (whitespace.indexOf(str.charAt(i)) === -1) {
            str = str.substring(i);
            break;
        }
    }
    
    l = str.length;
    for (i = l - 1; i >= 0; i--) {
        if (whitespace.indexOf(str.charAt(i)) === -1) {
            str = str.substring(0, i + 1);
            break;
        }
    }
    
    return whitespace.indexOf(str.charAt(0)) === -1 ? str : '';
}// }}}

// {{{ implode
function implode( glue, pieces ) {
    // Join array elements with a string
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_implode/
    // +       version: 811.1314
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Waldo Malqui Silva
    // *     example 1: implode(' ', ['Kevin', 'van', 'Zonneveld']);
    // *     returns 1: 'Kevin van Zonneveld'

    return ( ( pieces instanceof Array ) ? pieces.join ( glue ) : pieces );
}// }}}

// {{{ base64_encode
function base64_encode( data ) {
    // Encodes data with MIME base64
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_base64_encode/
    // +       version: 809.522
    // +   original by: Tyler Akins (http://rumkin.com)
    // +   improved by: Bayron Guevara
    // +   improved by: Thunder.m
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)        
    // -    depends on: utf8_encode
    // *     example 1: base64_encode('Kevin van Zonneveld');
    // *     returns 1: 'S2V2aW4gdmFuIFpvbm5ldmVsZA=='

    // mozilla has this native
    // - but breaks in 2.0.0.12!
    //if (typeof window['atob'] == 'function') {
    //    return atob(data);
    //}
        
    var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
    var o1, o2, o3, h1, h2, h3, h4, bits, i = ac = 0, enc="", tmp_arr = [];
    data = utf8_encode(data);
    
    do { // pack three octets into four hexets
        o1 = data.charCodeAt(i++);
        o2 = data.charCodeAt(i++);
        o3 = data.charCodeAt(i++);

        bits = o1<<16 | o2<<8 | o3;

        h1 = bits>>18 & 0x3f;
        h2 = bits>>12 & 0x3f;
        h3 = bits>>6 & 0x3f;
        h4 = bits & 0x3f;

        // use hexets to index into b64, and append result to encoded string
        tmp_arr[ac++] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
    } while (i < data.length);
    
    enc = tmp_arr.join('');
    
    switch( data.length % 3 ){
        case 1:
            enc = enc.slice(0, -2) + '==';
        break;
        case 2:
            enc = enc.slice(0, -1) + '=';
        break;
    }

    return enc;
}// }}}

// {{{ utf8_encode
function utf8_encode ( string ) {
    // Encodes an ISO-8859-1 string to UTF-8
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_utf8_encode/
    // +       version: 811.1414
    // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: sowberry
    // +    tweaked by: Jack
    // +   bugfixed by: Onno Marsman
    // +   improved by: Yves Sucaet
    // +   bugfixed by: Onno Marsman
    // *     example 1: utf8_encode('Kevin van Zonneveld');
    // *     returns 1: 'Kevin van Zonneveld'

    string = (string+'').replace(/\r\n/g, "\n").replace(/\r/g, "\n");

    var utftext = "";
    var start, end;
    var stringl = 0;

    start = end = 0;
    stringl = string.length;
    for (var n = 0; n < stringl; n++) {
        var c1 = string.charCodeAt(n);
        var enc = null;

        if (c1 < 128) {
            end++;
        } else if((c1 > 127) && (c1 < 2048)) {
            enc = String.fromCharCode((c1 >> 6) | 192) + String.fromCharCode((c1 & 63) | 128);
        } else {
            enc = String.fromCharCode((c1 >> 12) | 224) + String.fromCharCode(((c1 >> 6) & 63) | 128) + String.fromCharCode((c1 & 63) | 128);
        }
        if (enc != null) {
            if (end > start) {
                utftext += string.substring(start, end);
            }
            utftext += enc;
            start = end = n+1;
        }
    }

    if (end > start) {
        utftext += string.substring(start, string.length);
    }

    return utftext;
}// }}}

// {{{ strtolower
function strtolower( str ) {
    // Make a string lowercase
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_strtolower/
    // +       version: 809.2912
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Onno Marsman
    // *     example 1: strtolower('Kevin van Zonneveld');
    // *     returns 1: 'kevin van zonneveld'

    return (str+'').toLowerCase();
}// }}}

// {{{ substr
function substr( f_string, f_start, f_length ) {
    // Return part of a string
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_substr/
    // +       version: 810.819
    // +     original by: Martijn Wieringa
    // +     bugfixed by: T.Wild
    // +      tweaked by: Onno Marsman
    // *       example 1: substr('abcdef', 0, -1);
    // *       returns 1: 'abcde'
    // *       example 2: substr(2, 0, -6);
    // *       returns 2: ''

    f_string += '';

    if(f_start < 0) {
        f_start += f_string.length;
    }

    if(f_length == undefined) {
        f_length = f_string.length;
    } else if(f_length < 0){
        f_length += f_string.length;
    } else {
        f_length += f_start;
    }

    if(f_length < f_start) {
        f_length = f_start;
    }

    return f_string.substring(f_start, f_length);
}// }}}

// {{{ htmlspecialchars
function htmlspecialchars (string, quote_style) {
    // Convert special characters to HTML entities
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_htmlspecialchars/
    // +       version: 810.2018
    // +   original by: Mirek Slugen
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Nathan
    // +   bugfixed by: Arno
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // -    depends on: get_html_translation_table
    // *     example 1: htmlspecialchars("<a href='test'>Test</a>", 'ENT_QUOTES');
    // *     returns 1: '&lt;a href=&#039;test&#039;&gt;Test&lt;/a&gt;'

    var histogram = {}, symbol = '', tmp_str = '', i = 0;
    tmp_str = string.toString();
    
    if (false === (histogram = get_html_translation_table('HTML_SPECIALCHARS', quote_style))) {
        return false;
    }
    
    for (symbol in histogram) {
        entity = histogram[symbol];
        tmp_str = tmp_str.split(symbol).join(entity);
    }
    
    return tmp_str;
}// }}}

// {{{ htmlspecialchars_decode
function htmlspecialchars_decode(string, quote_style) {
    // Convert special HTML entities back to characters
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_htmlspecialchars_decode/
    // +       version: 810.2018
    // +   original by: Mirek Slugen
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Mateusz "loonquawl" Zalega
    // +      input by: ReverseSyntax
    // +      input by: Slawomir Kaniecki
    // +      input by: Scott Cariss
    // +      input by: Francois
    // +   bugfixed by: Onno Marsman
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // -    depends on: get_html_translation_table
    // *     example 1: htmlspecialchars_decode("<p>this -&gt; &quot;</p>", 'ENT_NOQUOTES');
    // *     returns 1: '<p>this -> &quot;</p>'

    var histogram = {}, symbol = '', tmp_str = '', i = 0;
    tmp_str = string.toString();
    
    if (false === (histogram = get_html_translation_table('HTML_SPECIALCHARS', quote_style))) {
        return false;
    }
    
    for (symbol in histogram) {
        entity = histogram[symbol];
        tmp_str = tmp_str.split(entity).join(symbol);
    }
    
    return tmp_str;
}// }}}

// {{{ get_html_translation_table
function get_html_translation_table(table, quote_style) {
    // Returns the translation table used by htmlspecialchars() and htmlentities()
    // 
    // +    discuss at: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_get_html_translation_table/
    // +       version: 811.1314
    // +   original by: Philip Peterson
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: noname
    // %          note: It has been decided that we're not going to add global
    // %          note: dependencies to php.js. Meaning the constants are not
    // %          note: real constants, but strings instead. integers are also supported if someone
    // %          note: chooses to create the constants themselves.
    // %          note: Table from http://www.the-art-of-web.com/html/character-codes/
    // *     example 1: get_html_translation_table('HTML_SPECIALCHARS');
    // *     returns 1: {'"': '&quot;', '&': '&amp;', '<': '&lt;', '>': '&gt;'}
    
    var entities = {}, histogram = {}, decimal = 0, symbol = '';
    var constMappingTable = {}, constMappingQuoteStyle = {};
    var useTable = {}, useQuoteStyle = {};
    
    useTable      = (table ? table.toUpperCase() : 'HTML_SPECIALCHARS');
    useQuoteStyle = (quote_style ? quote_style.toUpperCase() : 'ENT_COMPAT');
    
    // Translate arguments
    constMappingTable[0]      = 'HTML_SPECIALCHARS';
    constMappingTable[1]      = 'HTML_ENTITIES';
    constMappingQuoteStyle[0] = 'ENT_NOQUOTES';
    constMappingQuoteStyle[2] = 'ENT_COMPAT';
    constMappingQuoteStyle[3] = 'ENT_QUOTES';
    
    // Map numbers to strings for compatibilty with PHP constants
    if (!isNaN(useTable)) {
        useTable = constMappingTable[useTable];
    }
    if (!isNaN(useQuoteStyle)) {
        useQuoteStyle = constMappingQuoteStyle[useQuoteStyle];
    }
    
    if (useTable == 'HTML_SPECIALCHARS') {
        // ascii decimals for better compatibility
        entities['38'] = '&amp;';
        entities['60'] = '&lt;';
        entities['62'] = '&gt;';
    } else if (useTable == 'HTML_ENTITIES') {
        // ascii decimals for better compatibility
        entities['38'] = '&amp;';
        entities['60'] = '&lt;';
        entities['62'] = '&gt;';
        entities['160'] = '&nbsp;';
        entities['161'] = '&iexcl;';
        entities['162'] = '&cent;';
        entities['163'] = '&pound;';
        entities['164'] = '&curren;';
        entities['165'] = '&yen;';
        entities['166'] = '&brvbar;';
        entities['167'] = '&sect;';
        entities['168'] = '&uml;';
        entities['169'] = '&copy;';
        entities['170'] = '&ordf;';
        entities['171'] = '&laquo;';
        entities['172'] = '&not;';
        entities['173'] = '&shy;';
        entities['174'] = '&reg;';
        entities['175'] = '&macr;';
        entities['176'] = '&deg;';
        entities['177'] = '&plusmn;';
        entities['178'] = '&sup2;';
        entities['179'] = '&sup3;';
        entities['180'] = '&acute;';
        entities['181'] = '&micro;';
        entities['182'] = '&para;';
        entities['183'] = '&middot;';
        entities['184'] = '&cedil;';
        entities['185'] = '&sup1;';
        entities['186'] = '&ordm;';
        entities['187'] = '&raquo;';
        entities['188'] = '&frac14;';
        entities['189'] = '&frac12;';
        entities['190'] = '&frac34;';
        entities['191'] = '&iquest;';
        entities['192'] = '&Agrave;';
        entities['193'] = '&Aacute;';
        entities['194'] = '&Acirc;';
        entities['195'] = '&Atilde;';
        entities['196'] = '&Auml;';
        entities['197'] = '&Aring;';
        entities['198'] = '&AElig;';
        entities['199'] = '&Ccedil;';
        entities['200'] = '&Egrave;';
        entities['201'] = '&Eacute;';
        entities['202'] = '&Ecirc;';
        entities['203'] = '&Euml;';
        entities['204'] = '&Igrave;';
        entities['205'] = '&Iacute;';
        entities['206'] = '&Icirc;';
        entities['207'] = '&Iuml;';
        entities['208'] = '&ETH;';
        entities['209'] = '&Ntilde;';
        entities['210'] = '&Ograve;';
        entities['211'] = '&Oacute;';
        entities['212'] = '&Ocirc;';
        entities['213'] = '&Otilde;';
        entities['214'] = '&Ouml;';
        entities['215'] = '&times;';
        entities['216'] = '&Oslash;';
        entities['217'] = '&Ugrave;';
        entities['218'] = '&Uacute;';
        entities['219'] = '&Ucirc;';
        entities['220'] = '&Uuml;';
        entities['221'] = '&Yacute;';
        entities['222'] = '&THORN;';
        entities['223'] = '&szlig;';
        entities['224'] = '&agrave;';
        entities['225'] = '&aacute;';
        entities['226'] = '&acirc;';
        entities['227'] = '&atilde;';
        entities['228'] = '&auml;';
        entities['229'] = '&aring;';
        entities['230'] = '&aelig;';
        entities['231'] = '&ccedil;';
        entities['232'] = '&egrave;';
        entities['233'] = '&eacute;';
        entities['234'] = '&ecirc;';
        entities['235'] = '&euml;';
        entities['236'] = '&igrave;';
        entities['237'] = '&iacute;';
        entities['238'] = '&icirc;';
        entities['239'] = '&iuml;';
        entities['240'] = '&eth;';
        entities['241'] = '&ntilde;';
        entities['242'] = '&ograve;';
        entities['243'] = '&oacute;';
        entities['244'] = '&ocirc;';
        entities['245'] = '&otilde;';
        entities['246'] = '&ouml;';
        entities['247'] = '&divide;';
        entities['248'] = '&oslash;';
        entities['249'] = '&ugrave;';
        entities['250'] = '&uacute;';
        entities['251'] = '&ucirc;';
        entities['252'] = '&uuml;';
        entities['253'] = '&yacute;';
        entities['254'] = '&thorn;';
        entities['255'] = '&yuml;';
    } else {
        throw Error("Table: "+useTable+' not supported');
        return false;
    }
    
    if (useQuoteStyle != 'ENT_NOQUOTES') {
        entities['34'] = '&quot;';
    }
    
    if (useQuoteStyle == 'ENT_QUOTES') {
        entities['39'] = '&#039;';
    }
    
    // ascii decimals to real symbols
    for (decimal in entities) {
        symbol = String.fromCharCode(decimal)
        histogram[symbol] = entities[decimal];
    }
    
    return histogram;
}// }}}