function validate(value,id)
{
var httpxml;
try
{
// Firefox, Opera 8.0+, Safari
httpxml=new XMLHttpRequest();
}
catch (e)
{
// Internet Explorer
try
{
httpxml=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
httpxml=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
alert("Your browser does not support AJAX!");
return false;
}
}
}
function stateck() 
{
if(httpxml.readyState==4)
{
switch(id){
case "firstname":document.getElementById("msgfirst").innerHTML=httpxml.responseText;break;
case "lastname":document.getElementById("msglast").innerHTML=httpxml.responseText;break;
case "email":document.getElementById("msgemail").innerHTML=httpxml.responseText;break;
case "username":document.getElementById("msguser").innerHTML=httpxml.responseText;break;
case "password":document.getElementById("msgpass").innerHTML=httpxml.responseText;break;
case "password2":document.getElementById("msgrepp").innerHTML=httpxml.responseText;break;
}
}
}
var url="ajax/validate.php";
url=url+"?"+id+"="+value;
httpxml.onreadystatechange=stateck;
httpxml.open("GET",url,true);
httpxml.send(null);
}