var xmlhttp

				function showHint(str)
				{
				if (str.length==0)
				  {
				  document.getElementById("txtHint").innerHTML="";
				  return;
				  }
				xmlhttp=GetXmlHttpObject();
				if (xmlhttp==null)
				  {
				  alert ("Your browser does not support XMLHTTP!");
				  return;
				  }
				var url="check-email.php";
				url=url+"?q="+str;
				url=url+"&sid="+Math.random();
				xmlhttp.onreadystatechange=stateChanged;
				xmlhttp.open("GET",url,true);
				xmlhttp.send(null);
				}

				function stateChanged()
				{
				if (xmlhttp.readyState==4)
				  {
				  document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
					  if(document.getElementById("txtHint").innerHTML == 'YES'){
						document.getElementById("txtHint").style.color="green";
						document.getElementById("send_the_email").style.visibility="visible";
					  }
				  }
				}

				function GetXmlHttpObject()
				{
				if (window.XMLHttpRequest)
				  {
				  // code for IE7+, Firefox, Chrome, Opera, Safari
				  return new XMLHttpRequest();
				  }
				if (window.ActiveXObject)
				  {
				  // code for IE6, IE5
				  return new ActiveXObject("Microsoft.XMLHTTP");
				  }
				return null;
				}
				
				function start(){
					document.getElementById("send_the_email").style.visibility = "hidden";
				}