function toggleFeat() {
	var model_select = getObject('model');

	if (model_select.value==""){
		addClass('details','hidden');
	} else {
		removeClass('details','hidden');
	}

	addClass('x12','hidden');
	addClass('x15','hidden');
	addClass('511_f','hidden');
	addClass('511_p','hidden');
	addClass('512','hidden');
	addClass('515','hidden');
	addClass('712','hidden');
	addClass('715','hidden');

	
	switch(model_select.value) {
		case "511":
			removeClass('511_f','hidden');
			removeClass('511_p','hidden');
			break;
		case "512":
			removeClass('x12','hidden');
			removeClass('512','hidden');
			break;
		case "712":
			removeClass('x12','hidden');
			removeClass('712','hidden');
			break;
		case "515":
			removeClass('x15','hidden');
			removeClass('515','hidden');
			break;
		case "715":
			removeClass('x15','hidden');
			removeClass('715','hidden');
			break;
	}

}


function initDetails() {
	var model_select = getObject('model');
	
	model_select.onchange = toggleFeat;
	if (!model_select.value=="") {
		toggleFeat();
	}
}

addOnload("initDetails()");