Unable to set the value Inside the TextFiled using java script

[Ravi Kiran Va]

Hello ,

I am trying to set the Value inside the Textfiled using Javascript , but i am unable to set the value .
There is no Javascript error , but the value is not being updated

Please suggest

  if (xmlhttp.readyState == 4)
	   {
	     if(xmlhttp.status == 200) 
	     {
	    document.ajaxform.Display.value=xmlhttp.responseText; 
	     }
}

<form name="ajaxform">
<input type="text" id='Display' name="Display"/ >
</form>

I have also tried

document.getElementById('Display').value=xmlhttp.responseText; 

,

but not working , please suggest . Thanks

[Ravi Kiran Va]

I realized the problem is somehow XmlhttpRequest.responseText is being null .

Could anybody please tell me why the XMLHttpRequest.responseText is returning null ??

[Eric Pascarello]

Show more code...

Eric