function hideMenu(tagName) {
  if (document.layers)  { document.layers[tagName].visibility    = 'hidden';}
  if (document.all)     { document.all(tagName).style.visibility = 'hidden';}
  if (!document.all && document.getElementById)    {document.getElementById(tagName).style.visibility = 'hidden';}
}

function showMenu(tagName) {
  if (document.layers)  { document.layers[tagName].visibility    = 'visible';}
  if (document.all)     { 
							if (document.layers && window.innerWidth) 
								{
									window.onresize = NS4resize;
									window.NS4sIW = window.innerWidth;
									window.NS4sIH = window.innerHeight;
								}
							document.all(tagName).style.visibility = 'visible';
						}
  if (!document.all && document.getElementById)    {document.getElementById(tagName).style.visibility = 'visible';}
}

function NS4resize() {
	if (NS4sIW < window.innerWidth || 
		NS4sIW > window.innerWidth || 
		NS4sIH > window.innerHeight || 
		NS4sIH < window.innerHeight ) 
	{
		window.location.reload();
	}
}



function layerOpen(number){
		menuFlg = number;
		MM_swapImage('m_bt0' + number,'',DIR_PATH + 'images/m_bt0' + number + '_a.gif',1);
		showMenu(('menu0' + number));
}

function menuClick(num) {
	if (menuFlg != "") {
		MM_swapImage('m_bt0' + menuFlg,'',DIR_PATH + 'images/m_bt0' + menuFlg + '.gif',1);
		hideMenu('menu01');
		hideMenu('menu02');
		hideMenu('menu03');
		hideMenu('menu04');
		hideMenu('menu05');
	}
	if (menuFlg != num) {
		layerOpen(num);
	} else {
		menuFlg = "";
	}
}
function ImgRollOut(imgName) {
	if (imgName != "m_bt0" + menuFlg) {
		MM_swapImgRestore();
	}
}