var xmlHttp;
var ValidCode = 0;
var FormField = "";

//FIND STATE LIST
function GetXmlHttpObject(handler)
{   
	var objXMLHttp=null
	if (window.XMLHttpRequest) 
	{
		objXMLHttp=new XMLHttpRequest() 
	}   
	else if (window.ActiveXObject)  
	{
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")  
	}
	return objXMLHttp
}

// TO VALIDATE USERNAME
  function validate_Captcha(scode,val)
  {
	  FormField = val;
	 if (scode.length==0)
	{      
		return; 
	} 

	  xmlHttp=GetXmlHttpObject() 
		  if (xmlHttp==null)  
		  {   
			  alert ("Browser does not support HTTP Request");   
			  return;   
		  } 

	  url="validateSecurity.php"
	  url=url+"?scode="+scode
      url=url+"&sid="+Math.random();   
	  //alert(url);
	  xmlHttp.onreadystatechange=stateChanged;
	  xmlHttp.open("GET",url,true) ; 
	  xmlHttp.send(null);
  }
	
function stateChanged()
{
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")  
	{   
		if (xmlHttp.responseText == 0)
		{
			ValidCode = 1;
			var x=document.getElementsByName("txtCaptcha");

			alert("Invalid security code !");
			x[0].value = "";
			x[0].focus();
			return false;
		}
		else
		{
			FormField.submit();
		}
		
	} 
}