javascriptcookies设置、读取、删除实例代码

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 {
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;
}

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