JS操作Cookie - 学习日志

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Chen Liqiang

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More options Oct 14 2006, 2:56 am

From: "Chen Liqiang" <chen...@gmail.com>

Date: Fri, 13 Oct 2006 23:56:58 -0700

Local: Sat, Oct 14 2006 2:56 am

Subject: JS操作Cookie

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function GetCookieVal(offset)
//获得Cookie解码后的值
{
var endstr = documents.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = documents.cookie.length;
return unescape(documents.cookie.substring(offset, endstr));

}

function SetCookie(name, value)
//设定Cookie值
{
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)
//删除Cookie
{
var exp = new Date();
exp.setTime (exp.getTime() - 1);
var cval = GetCookie (name);
documents.cookie = name + "=" + cval + "; expires="+
exp.toGMTString();

}

function GetCookie(name)
//获得Cookie的原始值
{
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;

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