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 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();
	}