var expDays = 365;
var exp = new Date();
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));
 
function GetCookie (name) { 
	var arg = name + "=";
	var alen = arg.length; 
	var clen = document.cookie.length;
	var i = 0;  
	while (i < clen) {
		var j = i + alen; 
		if (document.cookie.substring(i, j) == arg) 
			return GetCookieVal (j); 
			i = document.cookie.indexOf(" ", i) + 1; 
		if (i == 0) break;  
	} 
	return 0;
}

function GetCookieVal(offset) {
	var endstr = document.cookie.indexOf (";", offset);
 	if (endstr == -1)
 		endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}
 
function UpdateCookie(name,value) {
	DeleteCookie(name);
	SetCookie(name,value,exp);
}

function SetCookie (name, value) {  
	var argv = SetCookie.arguments; 
	var argc = SetCookie.arguments.length;  
 	var expires = (argc > 2) ? argv[2] : null; 
 	var path = (argc > 3) ? argv[3] : null; 
 	var domain = (argc > 4) ? argv[4] : null; 
 	var secure = (argc > 5) ? argv[5] : false; 
 	document.cookie = name + "=" + escape (value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + "; path=/" + ((domain == null) ? "" : ("; domain=" + domain)) + ((secure == true) ? "; secure" : "");
 }
 
 function DeleteCookie (name) { 
 	var exp = new Date(); 
 	exp.setTime (exp.getTime() - 1);
 	var cval = GetCookie (name); 
 	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
 }
 
function SetSourceCookie(name,value) {
	DeleteCookie(name);
	SetCookie(name,value,exp);
}