¡¾javascript¡¿javascript cookies ÉèÖᢶÁÈ¡¡¢É¾³ýʵÀý´úÂë-cookies

function GetCookieVal(offset)
//»ñµÃCookie½âÂëºóµÄÖµ
{
var endstr=documents.cookie.indexOf (";", offset);
if (endstr==-1)
endstr=documents.cookie.length;
return unescape(documents.cookie.substring(offset, endstr));
}
function SetCookie(name, value)
//É趨CookieÖµ
{
var expdate=new Date();
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;
if(expires!=null) expdate.setTime(expdate.getTime() + ( expires * 1000 ));
documents.cookie=name + "=" + escape (value) +((expires==null) ? "" : ("; expires="+ expdate.toGMTString()))
+((path==null) ? "" : ("; path=" + path)) +((domain==null) ? "" : ("; domain=" + domain))
+((secure==true) ? "; secure" : "");
}
function DelCookie(name)
//ɾ³ýCookie
{
var exp=new Date();
exp.setTime (exp.getTime() - 1);
var cval=GetCookie (name);
documents.cookie=name + "=" + cval + "; expires="+ exp.toGMTString();
}
function GetCookie(name)
//»ñµÃCookieµÄԭʼֵ
{
var arg=name + "=";
var alen=arg.length;
var clen=documents.cookie.length;
var i=0;
while (i < clen)
{
var j=i + alen;
if (documents.cookie.substring(i, j)==arg)
return GetCookieVal (j);
i=documents.cookie.indexOf(" ", i) + 1;
if (i==0) break;
}
return null;
}