/* 
	url_encode version 1.0 
*/
function url_encode(str) { 

	var hex_chars = "0123456789ABCDEF"; 
	var noEncode = /^([a-zA-Z0-9\_\-\.])$/; 
	var n, strCode, hex1, hex2, strEncode = ""; 
	/* //var voltas = str.length;	*/

		for(n = 0; n < str.length; n++) { 
			if (noEncode.test(str.charAt(n))) { 
				strEncode += str.charAt(n); 
			} 
			else { 
				strCode = str.charCodeAt(n); 
				hex1 = hex_chars.charAt(Math.floor(strCode / 16)); 
				hex2 = hex_chars.charAt(strCode % 16); 
				strEncode += "%" + (hex1 + hex2); 
			} 
		} 
		return strEncode; 
	

} 

/*
	url_decode version 1.0 
*/
function url_decode(str) 
{  
	if(str != "" && str != "undefined")
	{
		var n, strCode, strDecode = ""; 
		var voltas = str.length; 
		for (n = 0; n < voltas; n++) { 
			if (str.charAt(n) == "%") { 
				strCode = str.charAt(n + 1) + str.charAt(n + 2); 
				strDecode += String.fromCharCode(parseInt(strCode, 16)); 
				n += 2; 
			} else { 
				strDecode += str.charAt(n); 
			} 
		} 
		return strDecode; 
	}
	else
	{
		return null;
	}
}