几个有用Cookie操作函数

function getCookieVal (offset) {
var endstr = documents.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = documents.cookie.length;
return unescape(documents.cookie.substring(offset, endstr));
}

function fixCookieDate (date) {
var base = new Date(0);
var skew = base.getTime(); // dawn of (Unix) time - should be 0
if (skew > 0) // Except on the Mac - ahead of its time
date.setTime (date.getTime() - skew);
}

function getCookie (name) {
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;
}

function setCookie (name,value,expires,path,domain,secure) {
documents.cookie = name + "=" + escape (value) +
((expires) ? "; expires=" + expires.toGMTString() : "") +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
((secure) ? "; secure" : "");
}

function deleteCookie (name,path,domain) {
if (getCookie(name)) {
documents.cookie = name + "=" +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
"; expires=Thu, 01-Jan-70 00:00:01 GMT";
}
}