var xmlHttp
var voted=true;
  function getVote()
 {
	
	var btn = valButton(document.f1.radiobutton);

	if (btn == null)
	{
		alert('Please select an option');
		return false;
	}else
	{
		
		xmlHttp=GetXmlHttpObject() 
		if (xmlHttp==null)
		{
			alert ("Browser does not support HTTP Request")
			return
		} 
			
				if (voted)
				{
					//alert('Thanks for your vote.')
					var url="./irisPoll/pollresult.php"
					url=url+"?vote="+btn
					//xmlHttp.onreadystatechange=stateChanged; 
					xmlHttp.open("GET",url,true)
					xmlHttp.send(null)
					
					window.open('./irisPoll/pollresult.php','IRISPOLL','toolbar=no,menubar=no,loction=no,scrollbars=no,resizable=no,width=375,height=300')
					voted=false;
				}
				else
				{
					alert('You have already voted');
				}
		
	}
			
		
			

	} 
 

 function valButton(btn)
{
    var cnt = -1;
    for (var i=btn.length-1; i > -1; i--)
		{
			if (btn[i].checked)
				{
					cnt = i; i = -1;
				}
		}
		if (cnt > -1) 
			return btn[cnt].value;
		else
			return null;
}
 function stateChanged() 
{ 
	if (xmlHttp.readyState==4)
		{ 
			//document.getElementById("pollVote").innerHTML=xmlHttp.responseText;
		}
}

  function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
	{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch (e)
	{
		// Internet Explorer
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}