COOKIE 问题

[man_la123]

怎么设两个cookie 一个刘栏器一关就清除 另一个永久保存

[孟子E章]

<SCRIPT>
function SetCookie(sName, sValue,sDate)
{
date = new Date(sDate)
if(sDate=="")
document.cookie = sName + "=" + escape(sValue) + ";";
else
document.cookie = sName + "=" + escape(sValue) + ";expires="+date.toGMTString()+";";
}

function GetCookie(sName)
{
var aCookie = document.cookie.split("; ");
for (var i=0; i < aCookie.length; i++)
{
var aCrumb = aCookie[i].split("=");
if (sName == aCrumb[0])
return unescape(aCrumb[1]);
}

return null;
}

function DelCookie(sName)
{
document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;";
}
alert(GetCookie("a"))
alert(GetCookie("b"))
SetCookie("a","aa","2006/1/1")
SetCookie("b","bb","")
</SCRIPT>