function cascade(casc) {
var x = casc;
for (var i=1;i<x;i++)
{
//alert (i);
	var show = 'showproductdiv'+i;
	switchMenu(show);
	//alert (show);
}
switchMenu('select');
}

	function switchMenu(obj) {
	var el = document.getElementById(obj);
	if ( el.style.display != "none" ) {
		el.style.display = 'none';
	}
	else {
		el.style.display = '';
	}
}