var saveWidth = 0;
function scaleImg(what, limit){
 what = document.getElementById(what);
 if (navigator.appName=="Netscape")
  winW = window.innerWidth;
 if (navigator.appName.indexOf("Microsoft")!=-1)
  winW = document.body.offsetWidth;
 if (what.width>(limit) || saveWidth>(limit)) {
  if (what.width==(limit))
   what.width=saveWidth;
  else {
   saveWidth = what.width;
   what.style.cursor = "pointer";
   what.width=(limit);
  }
 }
}