function ShowManufacturer(ctrlName)
{
	var sel = document.getElementById(ctrlName);
	var id = sel.options[sel.selectedIndex].value;
	if (id != "")
		window.location = "/article.asp?id=" + id;
}

function ShowManufacturerMotorbikes()
{
	var sel = document.getElementById("searchTyreManufacturerMotorbikes");
	var id = sel.options[sel.selectedIndex].value;
	if (id != "")
		window.location = "/article.asp?id=" + id;
}

function CheckVRM()
{
	return (document.vrmForm.searchVRM.value != "");
}

function CheckSize()
{
	var searchWidth = document.sizeForm.searchWidth;
	if (searchWidth.options[searchWidth.selectedIndex].value == "")
		return false;
		
	var searchWheelSize = document.sizeForm.searchWheelSize;
	if (searchWheelSize.options[searchWheelSize.selectedIndex].value == "")
		return false;

	return true;
}

function CheckMakeModel()
{
	return (document.makeModelForm.searchMake.selectedIndex > 0 &&
			document.makeModelForm.searchModel.selectedIndex > 0);
}

function CheckMotorbikes()
{
	var valuesOKandSpeedRatingSelected = document.motorbikesForm.searchMotorbikeFitment.selectedIndex > 0 && document.motorbikesForm.searchMotorbikeSpeedRating.options[document.motorbikesForm.searchMotorbikeSpeedRating.selectedIndex].text != "---";
	
	if (! (valuesOKandSpeedRatingSelected) )
	{
		alert('Please specify:\n \'Width\', \'Profile\', \'Wheel Size\', \'Speed Rating\' and \'Fitment\'\n for the Motorbike Tyre you\'d like to search for.');
	}
	
	return (valuesOKandSpeedRatingSelected);
}