var NS = (navigator.appName == "Netscape" &&navigator.appVersion.substring(0,1) == "4" );
var IE = (navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.substring(0,1) >= "4");

function SliderPosition() {
  if (NS) 
{
   with(document.showLenaNS) {
   left = self.pageXOffset + innerWidth - 80;
   top = self.pageYOffset + 30; }
 }
  else  if (IE) 
{  
   showLenax=document.all("showLena");
   with(document.body) {
   showLenax.style.left = scrollLeft + document.body.clientWidth - 50;
   showLenax.style.top = scrollTop + 30; }
}
return true;
}
function LenaShow() {
  if (NS) {document.write("<layer id=showLenaNS  top=30 width=36 height=79 clip='0,0,36,79'><a href='main.html'><img src='photogallery/lena_black_79.gif' width=36 height=79 border=0></a></layer>\n");}
  else 
  if (IE)  {document.write("<span id=showLena><a href='main.html' target='_top'><img src='photogallery/lena_black_79.gif' width=36 height=79 border=0></a></span>\n");}
  if (NS || IE) 
    {setInterval("SliderPosition()",500);} 
  return true;
}