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();
	
	var replacer = function(search, replace, str) {
		var tmp_arr = [];
		tmp_arr = str.split(search);
		return tmp_arr.join(replace);
	};
	
	// 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];
		ret = replacer(search, replace, ret) // Custom replace. No regexing
	}
	
	// Uppercase for full PHP compatibility
	return ret.replace(/(\%([a-z0-9]{2}))/g, function(full, m1, m2) {
		return "%"+m2.toUpperCase();
	});
	
	return ret;
}