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js实现cookie的删除获取与添加

2007-10-18 10:22 656 查看

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

<html>

<head>

<title>cookie处理函数练习(为我所写，非我所想:改善面向对象)</title>

function addCookie(objName,objValue,objHours)...{//添加cookie

var str = objName + "=" + escape(objValue);

if(objHours > 0)...{//为0时不设定过期时间，浏览器关闭时cookie自动消失

var date = new Date();

var ms = objHours*3600*1000;

date.setTime(date.getTime() + ms);

str += "; expires=" + date.toGMTString();

}

document.cookie = str;

alert("添加cookie成功");

}

function getCookie(objName)...{//获取指定名称的cookie的值

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

for(var i = 0;i < arrStr.length;i ++)...{

var temp = arrStr[i].split("=");

if(temp[0] == objName) return unescape(temp[1]);

}

function delCookie(name)...{//为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时间

var date = new Date();

date.setTime(date.getTime() - 10000);

document.cookie = name + "=a; expires=" + date.toGMTString();

}

function allCookie()...{//读取所有保存的cookie字符串

var str = document.cookie;

if(str == "")...{

str = "没有保存任何cookie";

}

alert(str);

}

function $(m,n)...{

return document.forms[m].elements
.value;

}

function add_()...{

var cookie_name = $("myform","cookie_name");

var cookie_value = $("myform","cookie_value");

var cookie_expireHours = $("myform","cookie_expiresHours");

addCookie(cookie_name,cookie_value,cookie_expireHours);

}

function get_()...{

var cookie_name = $("myform","cookie_name");

var cookie_value = getCookie(cookie_name);

alert(cookie_value);

}

function del_()...{

var cookie_name = $("myform","cookie_name");

delCookie(cookie_name);

alert("删除成功");

}

</script>

</head>

<body>

<div><label for="cookie_expireHours">多少个小时过期</lable><input type="text" name="cookie_expiresHours" /></div>

<div>

</div>

</form>

<hr />

</body>

</html>

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标签： button div javascript date html function

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