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JSP and AJAX

Posted on 2006-12-01
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Last Modified: 2013-11-24
I have a JSP in a web application that works like this:  There is an esn text field where users enter in the 11 digits serial number.  The moment the field loses focus (onblur), it will call a javascript method and AJAX to do some backend check and validation on the serial number.  If the esn is valid, nothing occurs but if invalid, a javascript popup messages appears saying "ESN Invalid..."

Now though, there is a new requirement where instead of popup messages, they want the messages to be displayed on the actual web page above the esn text field in red (like an error message).  Same function is used here where when onblur, validation is performed and if invalid, message dynamically appears on the web page.  However, I am at a loss as to how to do this.  How do I make messages appear above esn field and dynamically when onblur occurs?  I mean, through javascript, I can only make popup messages appear...

This web application is not written using struts but has its own framework.  

Any samples, ideas?  

If you don't understand the question, I can clarify.
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Question by:Magneto_Mystique
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6 Comments
 
LVL 26

Accepted Solution

by:
ksivananth earned 100 total points
ID: 18058597
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LVL 35

Assisted Solution

by:girionis
girionis earned 100 total points
ID: 18060142
> I mean, through javascript, I can only make popup messages appear...

Not really. You should have the text inside a <div> or an iframe tag that you will show and hide onBlur, something like:

<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>Test</title>
<script type="text/javascript">
<!--
window.onload = function()
{
      document.getElementById("afield").onblur = function()
      {
            document.getElementById("adiv").innerHTML = document.getElementById("afield").value;
      }
}
// --></script>
</head>
<body>
<form>
<input type="text" id="afield">
</form>
<div id="adiv"></div>
</body>
</html>

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LVL 26

Expert Comment

by:ksivananth
ID: 18071904
Hi girionis, this is what exactly in the link I have posted!
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LVL 35

Expert Comment

by:girionis
ID: 18074833
Hello ksivananth, I didn't look at your link when I posted. But now I am looking at it I can see that it is also talking about a div but it is not exactly the same, since I am using the onBlur() function while your link does not. Anyway, I am not here to steal points from you, so Magneto_Mystique if you go with the div solution please accept ksivananth's comment.
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