var xmlhttp

function showHint(first,second)
{
if (first.length==0)
  {
  document.getElementById("txtHint").innerHTML="";
  return;
  }
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Your browser does not support XMLHTTP!");
  return;
  }
var url="gethint.php";
url=url+"?user_login="+first;
url=url+"&user_domain="+second;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}
		
function stateChanged()
{
if (xmlhttp.readyState==4)
  {
  if (xmlhttp.responseText=='<font color="green">Vartotojo vardas laisvas.</font>') { document.getElementById("submit").disabled = false; } else { document.getElementById("submit").disabled = true; } 
  document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
  }
}
		      
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 GetVal(){
var x = document.a.didas.selectedIndex;
var domainid = document.a.didas.options[x].value;
var userlogin = document.getElementById("user_login").value;
alert(userlogin);

		 }
function valid(field) 
{ 
    var re = /^[0-9a-zA-Z_.]*$/; 
    if (!re.test(field.value)) { 
    alert('Naudojamas netinkamas simbolis!'); 
    field.value = field.value.replace(/[^0-9a-zA-Z_.]/g,"");
    return false; 
			       }
}