function urlencode (str) {
	// * 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'
	
	str = (str+'').toString();
	// Tilde should be allowed unescaped in future versions of PHP (as reflected below), but if you want to reflect current
	// PHP behavior, you would need to add ".replace(/~/g, '%7E');" to the following.
	return encodeURIComponent(str).replace(/!/g, '%21').replace(/'/g, '%27').replace(/\(/g, '%28').replace(/\)/g, '%29').replace(/\*/g, '%2A').replace(/%20/g, '+');
}