var last_prod_set;
var next_prod_set;
function showProductPage(v_prod_set)
{
	next_prod_set = v_prod_set;
	
	if (last_prod_set) {	
		togglePageNumLink(v_prod_set);
		togglePageNumLink(last_prod_set);	
		Effect.Fade(last_prod_set, {afterFinish: onPageUp});
	} else {
		Effect.Appear(v_prod_set);
		togglePageNumLink(v_prod_set);
		last_prod_set = v_prod_set;
	}
}
function onPageUp(obj)
{
	Effect.Appear(next_prod_set);
	last_prod_set = next_prod_set;
}
function togglePageNumLink(v_cat_set)
{
	var l = document.getElementById('l_'+v_cat_set);
	
	if (l) {
		td = l.style.textDecoration;
		if (td == 'underline') {
			l.style.textDecoration = 'none';
		} else {
			l.style.textDecoration = 'underline';
		}
	}
}