function serviceFormItemCallback()
{
	var targetPath = "";

	var service = document.getElementById( "serviceFormItem" );
	if( service == null )
	{
		alert( "service form item not found!" );
		return;
	}

	if( service.type == 'select-one' )
	{
		targetPath = service.options[ service.selectedIndex ].value;
	}

	if( targetPath.length == 0 )
		return;

	targetPath = "price_calc_" + targetPath + ".php";
	window.location = targetPath;
}