<script type="text/javascript">
function showEmail(str)
{
if (str=="")
  {
  document.getElementById("txtHint2").innerHTML="";
  return;
  }
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5 *************************
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("txtHint2").innerHTML=xmlhttp.responseText;
    }
  }
xmlhttp.open("GET","valemail.php?q="+str,true);
xmlhttp.send();
}
</script>

<input name="NAME" type="text"  value="21.12.1998"   onKeyUp="showEmail(this.value)"><div id="txtHint2" ><b></b></div>