var first_load=0;
var xmlHttp_city = createXmlHttpRequestObject();
var xmlHttp_city_crt= createXmlHttpRequestObject();

function createXmlHttpRequestObject() 
{     var xmlHttp; 

	  if(window.ActiveXObject) 
			{ 
					try 
					{ 
							xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); 
					} 
					catch (e) 
					{ 
							xmlHttp = false; 
					} 
			} 
			
			else 
			{ 
					try 
					{ 
							xmlHttp = new XMLHttpRequest(); 
							
					} 
					catch (e) 
					{ 
							xmlHttp = false; 
					} 
			} 	
			if (!xmlHttp) 
					alert("Error creating the XMLHttpRequest object."); 
			else 
					return xmlHttp; 
} 



function UserLogin()
{ 

  if(document.getElementById('username').value=='')
  {
    document.getElementById('validation_msg').style.display='block';
    document.getElementById('validation_msg').innerHTML='<b>* Please Enter Username</b>';
	document.getElementById('username').focus();
	return false;
     
  }
 if(document.getElementById('password').value=='')
  {
    document.getElementById('validation_msg').style.display='block';
    document.getElementById('validation_msg').innerHTML='<b>* Please Enter Password</b>';
	document.getElementById('password').focus();
	return false;
     
  }

if(document.getElementById('username').value!='' && document.getElementById('password').value!='')
  { 
       var username=document.getElementById('username').value;
       var password=document.getElementById('password').value;
       if (xmlHttp_city.readyState == 4 || xmlHttp_city.readyState == 0) 
		{     
                var url="action_taken.php?username="+username+"&password="+password+"&action=CheckLogin";
                xmlHttp_city.open("GET",url,false)
				xmlHttp_city.send(null); 
                xmlResponse =xmlHttp_city.responseText;
                 //alert(xmlResponse); 
                var xmlResponse = xmlResponse.replace(/^\s+|\s+$/g, '') ;
				if(xmlResponse == '0')
				{
				 document.getElementById('validation_msg').style.display='block';
                 document.getElementById('validation_msg').innerHTML="<b>* Invalid Username/Password</b>";
                 document.getElementById('password').value='';
                 document.getElementById('username').focus();
                 return false;
                }
		} 
	   
  }
  


document.loginForm.submit();
}