function show_products(){
	if(document.getElementById("sidebar").style.visibility != "visible"){
		document.getElementById("sidebar").style.visibility = "visible";
	}
	document.getElementById("ulproducts").style.visibility = "visible";
	return;
}
function hide_products(){
	if(document.getElementById("sidebar").style.visibility != "hidden"){
		document.getElementById("sidebar").style.visibility = "hidden";
	}
	document.getElementById("ulproducts").style.visibility = "hidden";
}