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();
}