var c=0;
var obj;
var speed=2;
function showLayer (Element) {
  if (obj == document.getElementById(Element)) { return; }
  else {
    divs=document.getElementsByTagName('div')
    for (var i=0; i<divs.length; i++) {
      divs[i].style.visibility = "hidden"
      if(divs[i].filters) { divs[i].style.filter='alpha(opacity='+0+')'; c=0; } 
      else { divs[i].style.opacity=0; c=0; }
    }
  }
  obj = document.getElementById(Element)
  obj.style.visibility = "visible"
  fadeInOut('in')
}

function fadeInOut(dir){
if(obj.filters) { obj.style.filter='alpha(opacity='+c+')'; } 
else { obj.style.opacity=c/100; }
if(dir=='in') { dir1='in'; c=c+10; } 
else { dir1='out'; c=c-10; }
if(c>100){ c=100; return; }
if(c<0){ c=0; return; }
setTimeout('fadeInOut(dir1)',speed)
}