Question

我有一个简单的用户登录面板，当用户名密码不正确弹出时会显示一条消息。但问题是，通常（并非总是）对于不正确或空字段，弹出窗口会出现两次。我知道它可以有简单的解决方案，但我已经尝试了很长时间来解决它。所以。任何有效的建议都会有很大的帮助。

我的javascript代码如下所示：

$("#password").keypress(function(e)
    {
        if (e.which == 13)
        {
            performLogin();
        }
    });

function performLogin(){
        var uName = $("#userName").val();
        var uPass = $("#password").val();
        var licenseType = $("#licenseType").val();

        $.post('./qServer',{
            type:'login',
            userName:uName,
            password:uPass,
            licenseType:licenseType
        }, function(data){
            someText = data.replace(/(\r\n|\n|\r)/gm,"");
            if(someText=='1'){
                window.location.reload();
            }
            else if(someText=='2')
            {
                $.prompt("Enter Required Field(s) Value");
            }
            else if(someText=='0')
            {
                $.prompt("Database Err: User Name or Password not valid"); 
            }
            else if(someText=='3')
            {
                $.prompt("Database Err: Invalid user"); 
            }
            else if(someText=='-1')
            {
                $.prompt("Failed to connect with Database"); 
            }
            else if(someText=='-2')
            {
                $.prompt("Syntem is unavailable please wait.."); 
            }
            else if(someText=='-3')
            {
                $.prompt("System is ready to undeployment. If you want to resume services without further deployment please restart you server"); 
            }
            else if(someText=='52e')
            {
                $.prompt("Active Directory Err: invalid credentials"); 
            }
            else if(someText=='525')
            {
                $.prompt("Active Directory Err: user not found"); 
            }
            else if(someText=='530')
            {
                $.prompt("Active Directory Err: not permitted to logon at this time"); 
            }
            else if(someText=='531')
            {
                $.prompt("Active Directory Err: not permitted to logon at this workstation"); 
            }
            else if(someText=='532')
            {
                $.prompt("Active Directory Err: password expired (remember to check the user set in osuser.xml also)"); 
            }
            else if(someText=='533')
            {
                $.prompt("Active Directory Err: account disabled"); 
            }
            else if(someText=='701')
            {
                $.prompt("Active Directory Err: account expired"); 
            }
            else if(someText=='773')
            {
                $.prompt("Active Directory Err: user must reset password"); 
            }
            else if(someText=='775')
            {
                $.prompt("Active Directory Err: user account locked"); 
            }
            else 
            {
                $.prompt("Active Directory Err: not authenticated user!"); 
            }

        });
    }

注意我已检查并发现在给出密码后按Enter键时，问题就出现了。

Answer 1

好吧，我自己可以解决问题，只需添加一行如下：

$("#password").keypress(function(e)
    {
        if (e.which == 13)
        {
            e.stopImmediatePropagation();
            performLogin();

        }
    });

e.stopImmediatePropagation()停止多次点击performLogin()。

$ .prompt（） - 单击时弹出多次

1 个答案: