var http = false;
if(navigator.appName == "Microsoft Internet Explorer") {
  http = new ActiveXObject("Microsoft.XMLHTTP");
} else {
  http = new XMLHttpRequest();
}


function checkdata() {
	var uid=document.getElementById('username11').value;
	http.open("GET","ckeckusr.php?status="+uid , true);
//alert("hello");

http.onreadystatechange=function() {
    if(http.readyState == 4) {
		document.getElementById('checkuser').innerHTML = http.responseText;
    }
  }
http.send(null);
}