JAVASCRIPT URLENCODE

function urlencode( str ) {
// http://kevin.vanzonneveld.net
// + original by: Philip Peterson
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// * example 1: urlencode('Kevin van Zonneveld!');
// * returns 1: 'Kevin+van+Zonneveld%21'
 
var ret = str;
 
ret = ret.toString();
ret = encodeURIComponent(ret);
ret = ret.replace(/%20/g, '+');
 
return ret;
}