[2005] refresh asp component only, not the whole page...

[mendhak]

What I'm really wanting to know is, can I use AJAX in a web application without using the ASP.NET AJAX tools and extensions?

Like incoporating this basic AJAX structure into a web app.

<script type = "text/javascript">


var xmlHttp;


function emailTo(user,useremail,usersubject,usermessage)
{

xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="default.aspx";
url=url+"?name="+user+"&useremail="+useremail+"&subject="+usersubject+"&Umessage="+usermessage;
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
} 

function stateChanged() 
{ 

if (xmlHttp.readyState==4)
{ 


alert(xmlHttp.responseText);

}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}


</script>

Thanks,

Justin Fox

To answer that specific question, yes, of course you can. ASP.NET AJAX is just a framework written over the kinds of things you're doing. Just put it into your <script> tag at the top of the page.