function tog(obj,state){
	var el = document.getElementById(obj);
	if ( state == "" ) { 
		var opp = el.checked;
		state = ( opp == false ) ? true : false; 
	}
	el.style.display = ( state == 0 ) ? 'none' : 'block';
}

function matchfields( a, b ) {
	if ( a != b || a == "" || b == "" ) { return 0; }
	else { return 1; }
}

function getHTTPObject(){
   if (window.ActiveXObject) 
       return new ActiveXObject("Microsoft.XMLHTTP");
   else if (window.XMLHttpRequest) 
       return new XMLHttpRequest();
   else {
      alert("Your browser does not support AJAX.");
      return null;
   }
}

function setOutput(){
    if(httpObject.readyState == 4){
    	alert( httpObject.responseText );
        document.getElementById("ckU").innerHTML = httpObject.responseText;
    }
 
}
 
// Implement business logic    
function ckUName(){    
    httpObject = getHTTPObject();
    if (httpObject != null) {
        httpObject.open("GET", "/dynamic.inc/uname_avail.php?q="
                        +document.getElementById('uname').value, true);
        httpObject.send(null); 
        httpObject.onreadystatechange = setOutput();
    }
}
 
var httpObject = null;

function ckUser(str)
{
if (str=="")
  {
  document.getElementById("ckU").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("ckU").innerHTML=xmlhttp.responseText;
    }
  }
xmlhttp.open("GET","/dynamic.inc/uname_avail.php?q="+str,true);
xmlhttp.send();
}