无法在javascript中比较两个字符串 [英] Unable to compare two Strings in javascript

问题描述

我在JavaScript中尝试两个比较两个字符串。但我想在比较时有一些问题。它不显示结果。

I am trying two compare two strings in JavaScript. But I guess there is some problem while comparing. It doesn't show the results.

if(ajaxRequest.readyState == 4){

    var msg = ajaxRequest.responseText;
    var fld = document.getElementById("prtCnt");
    if(msg == "false") {
        var msg = "This User Name is already taken !!!!";
        fld.className = "bp_invalid";
        //   fld.style.color=green;
        fld.innerHTML=msg;
    }

任何机构都可以告诉我问题在哪里？感谢。

Can any body tell me where the problem is? Thanks.

推荐答案

您可能想检查在从服务器返回的false字符串之前或之后是否有任何空格。您可以使用以下方法轻松完成此操作：

You might want to check if there's any space before or after the "false" string that you return from the server. You can do it easily with this:

alert('"' + msg + '"');

如果有额外的空间，您可以执行：

If there is extra space, you can just do:

msg = msg.trim();

然后执行if语句

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