function showMenu (id_div) {
	var objShowHide = 'menu_'+id_div;
	d=document;layer="";
	if(d.getElementById)layer1=d.getElementById(objShowHide).style;
	else if(d.layers)layer1=document.layers[objShowHide];
	else return 1;
	if(layer1.display=="")layer1.display="none";
	if(layer1.display!="none")layer1.display="none";
	else layer1.display="block";

	var objShowHide = 'menu_'+id_div+'_over';
	d=document;layer="";
	if(d.getElementById)layer1=d.getElementById(objShowHide).style;
	else if(d.layers)layer1=document.layers[objShowHide];
	else return 1;
	if(layer1.display=="")layer1.display="none";
	if(layer1.display!="none")layer1.display="none";
	else layer1.display="block";
}