【www.gdgbn.com--php函数】

我试图设置一个cookie，但我无法得到它的工作。
也有人请你指出为什么？
当点击了函数create_cookie被调用，但不是该Cookie。

<script type="text/javascript">
onError=errorhandler;
function errorhandler(msg,url,l)
{
text = "There was an error. n";
text+= "The error was : " + msg + " n";
text+= "It happened on " + url + " n ";
text+= "on line " + l + ".";
alert(text);
}

function readCookie()
{
    var cvalue = document.cookie;
    if(cvalue !== null || cvalue!= "")
    {
    return cvalue;
    }
    else
    {
    return false;
    }
}   
function delete_cookies()
{
var cnames = document.cookie;

for(var i in cnames)
{
    var exp_Date = new Date();
    document.cookie = cnames.i + "=""; expires=" + (exp_Date-1) + ";";
}
return true;
}
function create_cookie()
{
    var exp_Date = new Date();
    /*document.write(exp_Date);*/
    document.cookie = "test=yes; expires="+exp_Date+";";
    document.write("Lo
");
    return true;
}
</script>


<script type="text/javascript">
var x = readCookie();
document.write(x);
if((x != "") && (x !== null) && (x !== false))
{
document.write("
The cookie that has been set was : " + x);
document.write("
Clear cookies stored by this site.");
}
else if( x== "" || x === null || x === false)
{
document.write("
Set the cookie.");
alert("Hello");
}
</script>

您没有设置Cookie失效日期，正确。

设置为在特定天数到期使用

var exp_Date = new Date ();
var days =1;
exp_Date.setTime(exp_Date.getTime()+(days*24*60*60*1000));

document.cookie = "test=yes; expires=" + exp_Date.toGMTString();

to last till your current session only, remove all code for date, and just use

document.cookie = "test=yes;";

<script type="text/javascript">

function errorhandler(msg,url,l)
{
text = "There was an error. n";
text+= "The error was : " + msg + " n";
text+= "It happened on " + url + " n ";
text+= "on line " + l + ".";
alert(text);
}
onError=errorhandler;
function readCookie()
{
    alert("ja");
    var cvalue = document.cookie;
   
    if(cvalue!==false || cvalue!==null || cvalue!="")
    {
        if(cvalue !== null || cvalue != "")
        {
        return cvalue;
        }
        else
        {
        return false;
        }
    }
}   
function delete_cookies()
{
//var cnames/*_data*/ = document.cookie;
//var cnames = cname_data.split("=");
if(document.cookie !== null && document.cookie != "")
{
    var line = document.cookie.indexOf("=");
    var begin = 0;
    var cname = document.cookie.slice(begin,line);
    var exp_Date = new Date();
    exp_Date.setTime(exp_Date.getTime()-1000*60*60);
    if(document.cookie.indexOf("=") == document.cookie.lastindexOf("="))
    {
        document.cookie = cname + "=""; expires=" + exp_Date + ";";
        //alert("Cookie " + cname + " has been deleted.");
    }       
   
    else
    {
    var cookieval = cname + "=""; ";
    cookieval += "expires=" + exp_Date + ";";
    document.cookie = cookieval;
    cname = document.cookie;
    if(cname =="" || cname === false || cname === null)
    {
        break;
    }
   
    }
return true;
}
}

function create_cookie(cookval)
{
    var exp_Date = new Date();
    exp_Date.setTime(exp_Date.getTime()+1000*60*60);
    /*document.write(exp_Date);*/
    var cookieval = "user=" + cookval + "; ";
    cookieval += "expires=" + exp_Date + ";";
    document.cookie = cookieval;
    return true;
}
</script>


<script type="text/javascript">
var x = readCookie();
if(x != "" && x !== null && x !== false)
{
document.write("
The cookie that has been set was : " + x);
document.write("
Clear cookies stored by this site.");
}
else if( x== "" || x === null || x === false)
{
document.write("
Set the cookie.");
}
</script>

本文来源：http://www.gdgbn.com/jiaocheng/23075/