var request = getXMLHTTP();

function showModels()
{
	if(request)
	{
		var makeSelect = document.getElementById("makeoptions");
		var selectedMake = makeSelect.options[makeSelect.selectedIndex].value;
		request.open("post", "getAvailableModels.php?make=" + selectedMake + "&showAll=false");
	 	request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		request.onreadystatechange = handleShowModels;
		request.send(null);
	}
}

function handleShowModels()
{
	if(request.readyState == 4)
	{
		var response = request.responseText;
		var modelVals = response.split(",");
		var modelSelect = document.getElementById("modeloptions");
		modelSelect.length = 0;
		modelSelect.options[0] = new Option("Any Model","");
		if(response != "")
		{
			for(var x = 0; x < modelVals.length; x++)
			{
				modelSelect.options[x+1] = new Option(modelVals[x],modelVals[x]);
			}
		}
	}
}