dom = (document.getElementById) ? true : false;
nn4 = (document.layers) ? true : false;
ie = (document.all) ? true : false;
ie4 = (!dom && ie) ? true : false;

var timer1, timer2, timer3, timer4, timer5, timer6;

function ShowMenu(menu)
{
	if (menu == 'menu1') clearTimeout(timer1);
	if (menu == 'menu2') clearTimeout(timer2);
	if (menu == 'menu3') clearTimeout(timer3);
	if (menu == 'menu4') clearTimeout(timer4);
	if (menu == 'menu5') clearTimeout(timer5);
	if (menu == 'menu6') clearTimeout(timer6);
	
	if (dom) {document.getElementById(menu).style.visibility = "visible"; return true;};
	if (ie4) {document.all[menu].style.visibility = "visible"; return true;};
	if (nn4) {document.layers[menu].visibility = "show"; return true;};
}

function HideMenu(menu)
{
	if (menu == 'menu1')
	{
		if (dom) {timer1 = setTimeout("document.getElementById(\"" + menu + "\").style.visibility = \"hidden\"", 150); return true;};
		if (ie4) {timer1 = setTimeout("document.all[\"" + menu + "\"].style.visibility = \"hidden\"", 150); return true;};
		if (nn4) {timer1 = setTimeout("document.layers[\"" + menu + "\"].visibility = \"hide\"", 150); return true;};
	}
//
	if (menu == 'menu2')
	{
		if (dom) {timer2 = setTimeout("document.getElementById(\"" + menu + "\").style.visibility = \"hidden\"", 150); return true;};
		if (ie4) {timer2 = setTimeout("document.all[\"" + menu + "\"].style.visibility = \"hidden\"", 150); return true;};
		if (nn4) {timer2 = setTimeout("document.layers[\"" + menu + "\"].visibility = \"hide\"", 150); return true;};
	}
//
	if (menu == 'menu3')
	{
		if (dom) {timer3 = setTimeout("document.getElementById(\"" + menu + "\").style.visibility = \"hidden\"", 150); return true;};
		if (ie4) {timer3 = setTimeout("document.all[\"" + menu + "\"].style.visibility = \"hidden\"", 150); return true;};
		if (nn4) {timer3 = setTimeout("document.layers[\"" + menu + "\"].visibility = \"hide\"", 150); return true;};
	}
//
	if (menu == 'menu4')
	{
		if (dom) {timer4 = setTimeout("document.getElementById(\"" + menu + "\").style.visibility = \"hidden\"", 150); return true;};
		if (ie4) {timer4 = setTimeout("document.all[\"" + menu + "\"].style.visibility = \"hidden\"", 150); return true;};
		if (nn4) {timer4 = setTimeout("document.layers[\"" + menu + "\"].visibility = \"hide\"", 150); return true;};
	}
//
	if (menu == 'menu5')
	{
		if (dom) {timer5 = setTimeout("document.getElementById(\"" + menu + "\").style.visibility = \"hidden\"", 150); return true;};
		if (ie4) {timer5 = setTimeout("document.all[\"" + menu + "\"].style.visibility = \"hidden\"", 150); return true;};
		if (nn4) {timer5 = setTimeout("document.layers[\"" + menu + "\"].visibility = \"hide\"", 150); return true;};
	}
//
	if (menu == 'menu6')
	{
		if (dom) {timer6 = setTimeout("document.getElementById(\"" + menu + "\").style.visibility = \"hidden\"", 150); return true;};
		if (ie4) {timer6 = setTimeout("document.all[\"" + menu + "\"].style.visibility = \"hidden\"", 150); return true;};
		if (nn4) {timer6 = setTimeout("document.layers[\"" + menu + "\"].visibility = \"hide\"", 150); return true;};
	}
}