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Javascript equivilant of PHP's urlencode

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  1. function urlencode (str) {
  2.     // http://kevin.vanzonneveld.net
  3.     // +   original by: Philip Peterson
  4.     // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  5.     // +      input by: AJ
  6.     // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  7.     // +   improved by: Brett Zamir (http://brett-zamir.me)
  8.     // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  9.     // +      input by: travc
  10.     // +      input by: Brett Zamir (http://brett-zamir.me)
  11.     // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  12.     // +   improved by: Lars Fischer
  13.     // +      input by: Ratheous
  14.     // +      reimplemented by: Brett Zamir (http://brett-zamir.me)
  15.     // +   bugfixed by: Joris
  16.     // +      reimplemented by: Brett Zamir (http://brett-zamir.me)
  17.     // %          note 1: This reflects PHP 5.3/6.0+ behavior
  18.     // %        note 2: Please be aware that this function expects to encode into UTF-8 encoded strings, as found on
  19.     // %        note 2: pages served as UTF-8
  20.     // *     example 1: urlencode('Kevin van Zonneveld!');
  21.     // *     returns 1: 'Kevin+van+Zonneveld%21'
  22.     // *     example 2: urlencode('http://kevin.vanzonneveld.net/');
  23.     // *     returns 2: 'http%3A%2F%2Fkevin.vanzonneveld.net%2F'
  24.     // *     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');
  25.     // *     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'
  26.     str = (str + '').toString();
  27.  
  28.     // Tilde should be allowed unescaped in future versions of PHP (as reflected below), but if you want to reflect current
  29.     // PHP behavior, you would need to add ".replace(/~/g, '%7E');" to the following.
  30.     return encodeURIComponent(str).replace(/!/g, '%21').replace(/'/g, '%27').replace(/\(/g, '%28').
  31.     replace(/\)/g, '%29').replace(/\*/g, '%2A').replace(/%20/g, '+');
  32. }

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