function validateForm()
{
	if(obj.office.selectedIndex == 0)
	{
	alert("Please Select Office");		
	return;
	}	
	//get the id
	var id = obj.dept_id.value ;
	var oid = obj.office.value ;
	//all ok
	obj.action = "dept_home.php?id="+id+"&oid="+oid;
	obj.submit();
}


function showOffice(deptID)
{	
	var ajax = new AJAX();
	var arrParam = new Array();
	arrParam['id'] = deptID;
	ajax.getRequest('get_middle_office.php', arrParam, showResponse);	
	
}
function showResponse(retVal)
{
	document.getElementById('office').innerHTML = retVal;
}