var sub2=document.getElementById? document.getElementById("submenu2") : document.all? document.all.submenu2 : document.layers ? document.submenu2 : ""
var sub3=document.getElementById? document.getElementById("submenu3") : document.all? document.all.submenu3 : document.layers ? document.submenu3 : ""
var sub4=document.getElementById? document.getElementById("submenu4") : document.all? document.all.submenu4 : document.layers ? document.submenu4 : ""
var sub5=document.getElementById? document.getElementById("submenu5") : document.all? document.all.submenu5 : document.layers ? document.submenu5 : ""
var sub6=document.getElementById? document.getElementById("submenu6") : document.all? document.all.submenu6 : document.layers ? document.submenu6 : ""

function switchLayer2() {
  if (sub2.style.visibility=="visible") { sub2.style.visibility='hidden'; sub2.style.display='none'; document.images[5].src="images/a1.gif";
  } else { sub2.style.visibility="visible"; sub2.style.display="block"; document.images[5].src="images/a2.gif"; } }

function switchLayer3() {
  if (sub3.style.visibility=="visible") { sub3.style.visibility='hidden'; sub3.style.display='none'; document.images[6].src="images/a1.gif";
  } else { sub3.style.visibility="visible"; sub3.style.display="block"; document.images[6].src="images/a2.gif"; } }

function switchLayer4() {
  if (sub4.style.visibility=="visible") { sub4.style.visibility='hidden'; sub4.style.display='none'; document.images[7].src="images/a1.gif";
  } else { sub4.style.visibility="visible"; sub4.style.display="block"; document.images[7].src="images/a2.gif"; } }

function switchLayer5() {
  if (sub5.style.visibility=="visible") { sub5.style.visibility='hidden'; sub5.style.display='none'; document.images[8].src="images/a1.gif";
  } else { sub5.style.visibility="visible"; sub5.style.display="block"; document.images[8].src="images/a2.gif"; } }

function switchLayer6() {
  if (sub6.style.visibility=="visible") { sub6.style.visibility='hidden'; sub6.style.display='none'; document.images[9].src="images/a1.gif";
  } else { sub6.style.visibility="visible"; sub6.style.display="block"; document.images[9].src="images/a2.gif"; } }

function iPhoneBugFix() {
  if (navigator.userAgent.indexOf('iPhone') == -1) {
     document.getElementById('copyright_bottom').style.visibility = 'visible';
     document.getElementById('leftedge').style.visibility = 'visible';
  }
}