📄 14.12 读写cookie的函数.htm
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<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>标题页</title>
<script Language="JavaScript">
//获得Cookie解码后的值
function GetCookieVal(offset)
{
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}
//设定Cookie值-将值保存在Cookie中
function SetCookie(name, value)
{
var expdate = new Date(); //获取当前日期
var argv = SetCookie.arguments; //获取cookie的参数
var argc = SetCookie.arguments.length; //cookie的长度
var expires = (argc > 2) ? argv[2] : null; //cookie有效期
var path = (argc > 3) ? argv[3] : null; //cookie路径
var domain = (argc > 4) ? argv[4] : null; //cookie所在的应用程序域
var secure = (argc > 5) ? argv[5] : false; //cookie的加密安全设置
if(expires!=null) expdate.setTime(expdate.getTime() + ( expires * 1000 ));
document.cookie = name + "=" + escape (value) +((expires == null) ? "" : ("; expires="+ expdate.toGMTString()))
+((path == null) ? "" : ("; path=" + path)) +((domain == null) ? "" : ("; domain=" + domain))
+((secure == true) ? "; secure" : "");
}
//删除指定的Cookie
function DelCookie(name)
{
var exp = new Date();
exp.setTime (exp.getTime() - 1);
var cval = GetCookie (name); //获取当前cookie的值
document.cookie = name + "=" + cval + "; expires="+ exp.toGMTString(); //将日期设置为过期时间
}
//获得Cookie的值-name用来搜索Cookie的名字
function GetCookie(name)
{
var arg = name + "=";
var argLen= arg.length; //指定Cookie名的长度
var cookieLen= document.cookie.length; //获取cookie的长度
var i = 0;
while (i < cookieLen)
{
var j = i + argLen;
if (document.cookie.substring(i, j) == arg) //依次查找对应cookie名的值
return GetCookieVal (j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0) break;
}
return null;
}
</script>
</head>
<body>
<input type=text name="txt1" value="搜索引擎是百度">
<input type=button value="保存Cookie" onClick="javascript:SetCookie('sousuo', txt1.value)">
<input type=button value="获取Cookie" onClick=" javascript:alert(GetCookie('sousuo'))">
</body>
</html>
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