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)   
		{
			var endstr = document.cookie.indexOf (";", j);  
			if (endstr == -1)    
				endstr = document.cookie.length;  
			return unescape(document.cookie.substring(j, endstr));
		}
		i = document.cookie.indexOf(" ", i) + 1;    
		if (i == 0) 
			break;   
	}  
	return null;
}

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" : "");
}

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