js操作cookies

function Setcookie (name, value) { //设置名称为name,值为value的Cookie

var argc = SetCookie.arguments.length;

var argv = SetCookie.arguments;

var path = (argc > 3) ? argv[3] : null;

var domain = (argc > 4) ? argv[4] : null;

var secure = (argc > 5) ? argv[5] : false;

document.cookie = name + "=" + value +

((path == null) ? "" : ("; path=" + path)) +

((domain == null) ? "" : ("; domain=" + domain)) +

((secure == true) ? "; secure" : "");

}

function Deletecookie (name) { //删除名称为name的Cookie

var exp = new Date();

exp.setTime (exp.getTime() - 1);

var cval = GetCookie (name);

document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();

}

function Clearcookie() //清除COOKIE

{

var temp=document.cookie.split(";");

var loop3;

var ts;

for (loop3=0;loop3 {

ts=temp[loop3].split("=")[0];

if (ts.indexOf(’mycat’)!=-1)

DeleteCookie(ts); //如果ts含“mycat”则执行清除

}

}

function getCookieVal (offset) { //取得项名称为offset的cookie值

var endstr = document.cookie.indexOf (";", offset);

if (endstr == -1)

endstr = document.cookie.length;

return unescape(document.cookie.substring(offset, endstr));

}

function GetCookie (name) { //取得名称为name的cookie值

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;

}