function showFamilyProducts(){
	var family = $('productgroup').value;
	var firstOption = null;
	$('productid').childElements().each(function(v,i){
		if(v.getAttribute('product_family') == family){
			v.disabled = false;
			if(!firstOption) firstOption = v;
		}else{
			v.disabled = true;
		}
	}.bind(this));
	$('productid').value = firstOption.value;
}