function getXMLHTTP() 
{ //fuction to return the xml http object
	var xmlhttp=false;   
	try
	{
		xmlhttp=new XMLHttpRequest();
	}
	catch(e)    
	{       
		try
		{           
			xmlhttp= new ActiveXObject("Microsoft.XMLHTTP");
	    	}
	    	catch(e)
		{
			try
			{
				xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
			}
			catch(e1)
			{
		    		xmlhttp=false;
			}
	    	}
	}
	return xmlhttp;
}
function getSchool(state)
{
	var strURL="findSchool.php?state="+state;
	var req = getXMLHTTP(); 
	if (req)
	{
		req.onreadystatechange = function()
		{
			if (req.readyState == 4)
			{
				// only if "OK"
				if (req.status == 200)
				{
					document.getElementById('schools').innerHTML=req.responseText;
				} 
				else 
				{
					alert("There was a problem while using XMLHTTP:\n" + req.statusText);
				}
			}
		}
		req.open("GET", strURL, true);
		req.send(null);
	}
}