I am trying two pare two strings in JavaScript. But I guess there is some problem while paring. 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;
    }

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

I am trying two pare two strings in JavaScript. But I guess there is some problem while paring. 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;
    }

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

• javascript
• html
• string
• pare

• 2 Did you even check the value of msg? – takteek Commented Mar 3, 2012 at 5:07
• with out if condition it shows me false on web page. But with if it fails. – adesh Commented Mar 3, 2012 at 5:09
• 2 You might as well add the following "print" statement to see what value you are receiving in msg: alert(msg); Put that before your if(msg == 'false')... test, and amend your question with that additional information. – dyoo Commented Mar 3, 2012 at 5:20

2 Answers 2

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 + '"');

If there is extra space, you can just do:

msg = msg.trim();

and then do your if statement

Ensure that there is no white space around the word "false" with something like:

if( msg.match(/\s*false\s*/i) )