var OPTION_ZERO = null;
function onLeaChange(leaField)
{
	//alert('leadchange');
	
	if(OPTION_ZERO==null)
	{
		OPTION_ZERO = document.getElementById('school').innerHTML;
		// alert(OPTION_ZERO);
	}
	
	document.getElementById('school').style.display = 'none';
	document.getElementById('school').parentNode.style.visibility = 'visible';
	document.getElementById('loading').style.display = 'block';
	
	
	var url = '/assets/popups/getSchools.php?c='+leaField.value;
	xmlhttp=null;
	// code for Mozilla, etc.
	if (window.XMLHttpRequest)
	{
		xmlhttp=new XMLHttpRequest()
	}
	// code for IE
	else if (window.ActiveXObject)
	{
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		
	}
	if (xmlhttp!=null)
	{
		xmlhttp.onreadystatechange=function()
		{
			if (xmlhttp.readyState==4)
			{
				// if "OK"
				// alert(xmlhttp.responseText);
				if (xmlhttp.status==200)
				{
					document.getElementById('loading').style.display = 'none';
					if(xmlhttp.responseText)
					{
						var html = xmlhttp.responseText;
						document.getElementById('school').innerHTML = '<select name="school"><option value="">Select</option>'+html+'</select>';
						document.getElementById('school').style.display = '';						
						// alert(document.getElementById('school').innerHTML);
					}
				}
				else
				{
					alert("Problem retrieving XML data")
				}
			}
		}
		xmlhttp.open("GET",url,true)
		xmlhttp.send(null)
	}
	else
	{
		alert("Your browser does not support XMLHTTP.")
	}
}