function urlencode( str ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Philip Peterson
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: AJ
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // %          note: info on what encoding functions to use from: http://xkr.us/articles/javascript/encode-compare/
    // *     example 1: urlencode('Kevin van Zonneveld!');
    // *     returns 1: 'Kevin+van+Zonneveld%21'
    // *     example 2: urlencode('http://kevin.vanzonneveld.net/');
    // *     returns 2: 'http%3A%2F%2Fkevin.vanzonneveld.net%2F'
    // *     example 3: urlencode('http://www.google.nl/search?q=php.js&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a');
    // *     returns 3: 'http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3Dphp.js%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dcom.ubuntu%3Aen-US%3Aunofficial%26client%3Dfirefox-a'
                                     
    var histogram = {}, histogram_r = {}, code = 0, tmp_arr = [];
    var ret = str.toString();
    
    // The histogram is identical to the one in urldecode.
    histogram['!']   = '%21';
    histogram['%20'] = '+';
    
    // Begin with encodeURIComponent, which most resembles PHP's encoding functions
    ret = encodeURIComponent(ret);
    
    for (search in histogram) {
        replace = histogram[search];
        tmp_arr = ret.split(search); // Custom replace
        ret = tmp_arr.join(replace); 
    }
    
    // Uppercase for full PHP compatibility
    return ret.replace(/(\%([a-z0-9]{2}))/g, function(full, m1, m2) {
        return "%"+m2.toUpperCase();
    });
    
    return ret;
}

function require( filename ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Michael White (http://crestidg.com)
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // %        note 1: Force Javascript execution to pause until the file is loaded. Usually causes failure if the file never loads. ( Use sparingly! )
    // -    depends on: file_get_contents
    // *     example 1: require('http://www.phpjs.org/js/phpjs/_supporters/pj_test_supportfile_2.js');
    // *     returns 1: 2
 
    var js_code = file_get_contents(filename);
    var script_block = document.createElement('script');
    script_block.type = 'text/javascript';
    var client_pc = navigator.userAgent.toLowerCase();
    if((client_pc.indexOf("msie") != -1) && (client_pc.indexOf("opera") == -1)) {
        script_block.text = js_code;
    } else {
        script_block.appendChild(document.createTextNode(js_code));
    }
 
    if(typeof(script_block) != "undefined") {
        document.getElementsByTagName("head")[0].appendChild(script_block);
 
        // save include state for reference by include_once and require_once()
        var cur_file = {};
        cur_file[window.location.href] = 1;
 
        if (!window.php_js) window.php_js = {};
        if (!window.php_js.includes) window.php_js.includes = cur_file;
 
        if (!window.php_js.includes[filename]) {
            window.php_js.includes[filename] = 1;
        } else {
            // Use += 1 because ++ waits until AFTER the original value is returned to increment the value.
            return window.php_js.includes[filename] += 1;
        }
    }
}

function require_once(filename) {
    // http://kevin.vanzonneveld.net
    // +   original by: Michael White (http://crestidg.com)
    // -    depends on: require
    // *     example 1: require_once('http://www.phpjs.org/js/phpjs/_supporters/pj_test_supportfile_2.js');
    // *     returns 1: true
 
    var cur_file = {};
    cur_file[window.location.href] = 1;
 
    // save include state for reference by include_once and require_once()
    if (!window.php_js) window.php_js = {};
    if (!window.php_js.includes) window.php_js.includes = cur_file;
    if (!window.php_js.includes[filename]) {
        if (require(filename)) {
            return true;
        }
    } else {
        return true;
    }
}

function htmlentities( string ){
    // http://kevin.vanzonneveld.net
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    revised by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // %          note: table from http://www.the-art-of-web.com/html/character-codes/
    // *     example 1: htmlentities('Kevin & van Zonneveld');
    // *     returns 1: 'Kevin & van Zonneveld'
    
    var histogram = {}, code = 0, tmp_arr = [];
    
    histogram['34'] = 'quot';
    histogram['38'] = 'amp';
    histogram['60'] = 'lt';
    histogram['62'] = 'gt';
    histogram['160'] = 'nbsp';
    histogram['161'] = 'iexcl';
    histogram['162'] = 'cent';
    histogram['163'] = 'pound';
    histogram['164'] = 'curren';
    histogram['165'] = 'yen';
    histogram['166'] = 'brvbar';
    histogram['167'] = 'sect';
    histogram['168'] = 'uml';
    histogram['169'] = 'copy';
    histogram['170'] = 'ordf';
    histogram['171'] = 'laquo';
    histogram['172'] = 'not';
    histogram['173'] = 'shy';
    histogram['174'] = 'reg';
    histogram['175'] = 'macr';
    histogram['176'] = 'deg';
    histogram['177'] = 'plusmn';
    histogram['178'] = 'sup2';
    histogram['179'] = 'sup3';
    histogram['180'] = 'acute';
    histogram['181'] = 'micro';
    histogram['182'] = 'para';
    histogram['183'] = 'middot';
    histogram['184'] = 'cedil';
    histogram['185'] = 'sup1';
    histogram['186'] = 'ordm';
    histogram['187'] = 'raquo';
    histogram['188'] = 'frac14';
    histogram['189'] = 'frac12';
    histogram['190'] = 'frac34';
    histogram['191'] = 'iquest';
    histogram['192'] = 'Agrave';
    histogram['193'] = 'Aacute';
    histogram['194'] = 'Acirc';
    histogram['195'] = 'Atilde';
    histogram['196'] = 'Auml';
    histogram['197'] = 'Aring';
    histogram['198'] = 'AElig';
    histogram['199'] = 'Ccedil';
    histogram['200'] = 'Egrave';
    histogram['201'] = 'Eacute';
    histogram['202'] = 'Ecirc';
    histogram['203'] = 'Euml';
    histogram['204'] = 'Igrave';
    histogram['205'] = 'Iacute';
    histogram['206'] = 'Icirc';
    histogram['207'] = 'Iuml';
    histogram['208'] = 'ETH';
    histogram['209'] = 'Ntilde';
    histogram['210'] = 'Ograve';
    histogram['211'] = 'Oacute';
    histogram['212'] = 'Ocirc';
    histogram['213'] = 'Otilde';
    histogram['214'] = 'Ouml';
    histogram['215'] = 'times';
    histogram['216'] = 'Oslash';
    histogram['217'] = 'Ugrave';
    histogram['218'] = 'Uacute';
    histogram['219'] = 'Ucirc';
    histogram['220'] = 'Uuml';
    histogram['221'] = 'Yacute';
    histogram['222'] = 'THORN';
    histogram['223'] = 'szlig';
    histogram['224'] = 'agrave';
    histogram['225'] = 'aacute';
    histogram['226'] = 'acirc';
    histogram['227'] = 'atilde';
    histogram['228'] = 'auml';
    histogram['229'] = 'aring';
    histogram['230'] = 'aelig';
    histogram['231'] = 'ccedil';
    histogram['232'] = 'egrave';
    histogram['233'] = 'eacute';
    histogram['234'] = 'ecirc';
    histogram['235'] = 'euml';
    histogram['236'] = 'igrave';
    histogram['237'] = 'iacute';
    histogram['238'] = 'icirc';
    histogram['239'] = 'iuml';
    histogram['240'] = 'eth';
    histogram['241'] = 'ntilde';
    histogram['242'] = 'ograve';
    histogram['243'] = 'oacute';
    histogram['244'] = 'ocirc';
    histogram['245'] = 'otilde';
    histogram['246'] = 'ouml';
    histogram['247'] = 'divide';
    histogram['248'] = 'oslash';
    histogram['249'] = 'ugrave';
    histogram['250'] = 'uacute';
    histogram['251'] = 'ucirc';
    histogram['252'] = 'uuml';
    histogram['253'] = 'yacute';
    histogram['254'] = 'thorn';
    histogram['255'] = 'yuml';
    
    for (i = 0; i < string.length; ++i) {
        code = string.charCodeAt(i);
        if (code in histogram) {
            tmp_arr[i] = '&'+histogram[code]+';';
        } else {
            tmp_arr[i] = string.charAt(i);
        }
    }
    
    return tmp_arr.join('');
}