var xmlHttp

function convert()
{
	xmlHttp=GetXmlHttpObject();

	if (xmlHttp==null)
	  {
		  alert ("Your browser does not support AJAX!");
		  return;
	  }

	var url="cconvert.php";
	url=url + "?f=" + document.fconvert.f.value + "&t=" + document.fconvert.t.value + "&a=" + document.fconvert.a.value;
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}


function stateChanged()
{
	if (xmlHttp.readyState==4)
		{
			document.getElementById("cresult").innerHTML = xmlHttp.responseText;
		}
	else
		{
			document.getElementById("cresult").innerHTML = '<input type=image src="ajax-loader.gif" >';
		}
}

function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
	  {
		  // Firefox, Opera 8.0+, Safari
		  xmlHttp=new XMLHttpRequest();
	  }

	catch (e)
	  {
		  // Internet Explorer
		  try
		    {
		    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP.5.0");
		    }
		  catch (e)
		    {
		    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		    }
	  }
	return xmlHttp;
}