var xmlHttp;

function showdata()
{
	if(document.getElementById("first").value=="")
	{
		alert("Please Enter the Fields!!");
		return false;
	}
	var first=document.getElementById("first").value;
	var second=document.getElementById("second").value;
	var third=document.getElementById("third").value;
	
	document.getElementById("first").value="";
	document.getElementById("second").value="";
	document.getElementById("third").value="";
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	  {
	  alert ("Browser does not support HTTP Request");
	  return;
	  } 
	var url="table.php";
	url=url+"?first="+first;
	url=url+"&second="+second;
	url=url+"&third="+third;
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
} 

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("table").innerHTML=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;
}