function URLEncode(url) //Function to encode URL.
{
	// The Javascript escape and unescape functions do not correspond
	// with what browsers actually do...
	var SAFECHARS = "0123456789" + // Numeric
		"ABCDEFGHIJKLMNOPQRSTUVWXYZ" + // Alphabetic
		"abcdefghijklmnopqrstuvwxyz" +
		"-_.!~*'()"; // RFC2396 Mark characters
		
	var HEX = "0123456789ABCDEF";

	var plaintext = url;
	var encoded = "";
	for (var i = 0; i < plaintext.length; i++ ) 
	{
		var ch = plaintext.charAt(i);
		if( ch == " " ) 
		{
			encoded += "+"; // x-www-urlencoded, rather than %20
		} 
		else if (SAFECHARS.indexOf(ch) != -1) 
		{
			encoded += ch;
		} 
		else 
		{
			var charCode = ch.charCodeAt(0);
			if (charCode > 255) {
			alert( "Unicode Character '" 
			+ ch 
			+ "' cannot be encoded using standard URL encoding.\n" +
			"(URL encoding only supports 8-bit characters.)\n" +
			"A space (+) will be substituted." );
			encoded += "+";
			} else {
			encoded += "%";
			encoded += HEX.charAt((charCode >> 4) & 0xF);
			encoded += HEX.charAt(charCode & 0xF);
			}
		}
	}

	return encoded;
}

function URLDecode(url) //function decode URL
{
	// Replace + with ' '
	// Replace %xx with equivalent character
	// Put [ERROR] in output if %xx is invalid.
	var HEXCHARS = "0123456789ABCDEFabcdef"; 
	var encoded = url;
	var plaintext = "";

	var i = 0;
	while (i < encoded.length) 
	{
		var ch = encoded.charAt(i);
		
		if (ch == "+") 
		{
			plaintext += " ";
			i++;
		} 
		else if (ch == "%") 
		{
			if (i < (encoded.length-2) && HEXCHARS.indexOf(encoded.charAt(i+1)) != -1 && HEXCHARS.indexOf(encoded.charAt(i+2)) != -1 ) 
			{
				plaintext += unescape( encoded.substr(i,3) );
				i += 3;
			} 
			else 
			{
				alert( 'Bad escape combination near ...' + encoded.substr(i) );
				plaintext += "%[ERROR]";
				i++;
			}
		} 
		else 
		{
			plaintext += ch;
			i++;
		}
	} // while

	return plaintext;
};

// [Cookie] Clears a cookie
function clearCookie() 
{
	var now = new Date();
	var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);
	this.setCookie('currPage', 'cookieValue', yesterday);
};

// [Cookie] Sets value in a cookie
function setCookie( cookieName, cookieValue, expires, path, domain, secure ) 
{
	var cookieText =
		escape(cookieName) + '=' + escape(cookieValue)
		+ (expires ? '; expires=' + expires.toGMTString() : '')
		+ (path ? '; path=' + path : '')
		+ (domain ? '; domain=' + domain : '')
		+ (secure ? '; secure' : '');
		
	document.cookie = cookieText;
};


// [Cookie] Gets a value from a cookie
function getCookie( cookieName ) 
{
	var item = '';
	var posName = document.cookie.indexOf(escape(cookieName) + '=');
	if (posName != -1) 
	{
		var posValue = posName + (escape(cookieName) + '=').length;
		var endPos = document.cookie.indexOf(';', posValue);
		if (endPos != -1) 
			item = unescape(document.cookie.substring(posValue, endPos));
		else 
			item = unescape(document.cookie.substring(posValue));
	}

	return (item);
};