//var browser = navigator.appName
//var isNav, isIE

var ns4=document.layers;
var ns6=document.getElementById&&!document.all;
var ie4=document.all;

//if (browser == "Netscape") 
//{ 
//  isNav = true	
//}
//else 
//{ 
//  if (browser == "Microsoft Internet Explorer") 
//  { 
//    isIE = true	
//  }
//}

var cm=null;
document.onclick = new Function("show(null)")

function show(el,mName) 
{
  var m;

  // Netscape 4
  if (ns4)
  {
    if (mName) 
    {
      m = document.layers[mName];
      m.visibility="show";
    }
    if ((m!=cm) && (cm)) 
      cm.visibility='hide';
    cm=m;
  }
	
  // Netscape 6
  else if (ns6)
  {
    if (mName) 
    {
      m = document.getElementById(mName).style;
      m.visibility="visible";
    }
    if ((m!=cm) && (cm)) 
      cm.visibility='hidden';
    cm=m;
  }  

  // Internet Explorer
  else if(ie4) 
  {
    if (mName) 
    {
	  m = document.all[mName].style;

      m.visibility='';
    }
    if ((m!=cm) && (cm)) 
	  cm.visibility='hidden';
    cm=m;
  }
}