function getCookieVal (offset) 
{  
	var endstr = document.cookie.indexOf (";", offset);  

	if (endstr == -1)    
		endstr = document.cookie.length; 
 
	return unescape(document.cookie.substring(offset, endstr));
}

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 null;
}

function DeleteCookie(name) 
{  
	var exp = new Date();  
	exp.setTime (exp.getTime() - 1);  
	var cval = GetCookie(name); 
	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}

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 == null) ? "" : ("; path=" + path)) + ((domain == null) ? "" : ("; domain=" + domain)) + ((secure == true) ? "; secure" : "");
}