关于js操作cookies

ymf2004 2008-01-30 12:57:00

各位,我想问一下用js操作cookies为什么会记录路径?默认是当前页面的父目录,这样我网站其它目录的文件无法获得到之前那个cookies,应该如何解决呢?比如我的网站为A(文件夹)有两个子文件夹B和C,其中B中有b.asp,C中有c.asp

现在我让b.asp添加一个cookies,在客户端查看cookie文件名为B/

这样c.asp就无法获取之前那个cookies了,请问一下有什么解决的方法呢?

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mingxingxinxing 2011-11-03

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很好，不错

tantaiyizu 2008-01-30

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5楼的就很好啊

xiaojing7 2008-01-30

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

<html>

	<head>

		<meta http-equiv="Content-Type" content="text/html; charset=GB2312" />

		<title>Cookie处理函数练习</title>

		<script language="JavaScript" type="text/javascript">

		var $=function(el){

		    return (typeof el=='object')?el:document.getElementById(el);

		};		

	   var addCookie=function(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");

		};		

		var getCookie=function(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]);

				}

			} 

		};		

		var delCookie=function(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();

			alert("删除成功");

		};		

		var add=function(){//添加Cookie

			var cookie_name = $("cookie_name").value;

			var cookie_value = $("cookie_value").value;

			var cookie_expireHours = $("cookie_expiresHours").value;

			if(cookie_name==""||cookie_value==""){

			  alert("请填写完整Cookie的名称和值");

			  return;

			}

			addCookie(cookie_name,cookie_value,cookie_expireHours);

		};

		var getall=function(){//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);

		};

		var get=function(){//读取单个该名称的cookie

			var cookie_name = $("cookie_name").value;

			var cookie_value = getCookie(cookie_name);

			if(cookie_name ==""){			

			   alert("请填写名称，根据名称进行查找");

			 return;

			}

			if(cookie_value==null){

			  cookie_value="没有该名称的cookie";

			}			

			alert(cookie_value);

		};		

		var del=function(){//删除该名称的cookie

			var cookie_name = $("cookie_name").value;

			if(cookie_name==""){

			  alert("请填写名称，根据名称进行删除");

			  return;

			}			

			delCookie(cookie_name);			

		};

		</script>		

	</head>

	<body>

		<form name="myform">

			<div><label for="cookie_name">Cookie名称：</label><input type="text" name="cookie_name" /></div>

			<div><label for="cookie_value">Cookie  值：</lable><input type="text" name="cookie_value" /></div>

			<div><label for="cookie_expireHours">过期时间(小时)：</lable><input type="text" name="cookie_expiresHours" /></div><hr/>

			<div>

				<input type="button" value="添加该cookie" onclick="add()" />

				<input type="button" value="读取所有cookie" onclick="getall()" />

				<input type="button" value="读取该名称cookie的值" onclick="get()" />

				<input type="button" value="删除该名称cookie" onclick="del()" />

			</div>

		</form>

		<hr />

	</body>

</html>

littlelam 2008-01-30

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关键在于path="/"

littlelam 2008-01-30

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<script>

function setCookie(name, value, expires, path, domain)

{

	if(!expires) expires = -1;

	if(!path) path = "/";

    var d = "" + name + "=" + value;



	var e;

    if (expires < 0) {

        e = "";

    }

    else if (expires == 0) {

        var f = new Date(1970, 1, 1);

        e = ";expires=" + f.toUTCString();

    }

    else {

		var now  = new Date();

        var f = new Date(now.getTime()  + expires * 1000);

        e = ";expires=" + f.toUTCString();

    }

    var dm;

    if(!domain){

		dm = "";

    }

    else{

		dm = ";domain=" + domain;

    }



    document.cookie = name + "=" + value + ";path=" + path + e + dm;

};



function getCookie(a)

{

    var b = String(document.cookie);

    var c = b.indexOf(a + "=");



    if (c != -1) {

        var d = b.indexOf(";", c);

        d = d == -1 ? b.length : d;

        c = c + a.length + 1;

		if(b.charAt(c)=='"'&&b.charAt(d-1)=='"'){

			c+=1;d-=1;

		}

		if(c>=d)

			return "";

        return b.substring(c, d);

    }



    return "";

};

//setCookie("good", "hel43lo", 365, "/", document.domain)

//注意用"/"全站就可以读取了

document.write(getCookie("good"));

//alert(document.domain);

</script>