function div_swap(div_one, div_two) {
  $(div_one).style.display='none';
  $(div_two).style.display='block';
 // new Effect.BlindUp(div_one, {duration: 0.9, queue: 'front'});
 // new Effect.BlindDown(div_two, {duration: 0.9, queue: 'end'});
}

function changeModel(obj) {
	var selid = obj.options[obj.selectedIndex].value;
	$('model-pic').style.display='block';
	$('modelimg').src = models[selid];
}