function StartGlide() {
  window.setInterval("Glide()", 10);   }
function Glide() {
 glider.style.pixelLeft += 5;
if(glider.style.pixelLeft >= document.body.offsetWidth)
  glider.style.pixelLeft = 0;
 glider.style.pixelBottom += 5;
if(glider.style.pixelBottom >= document.body.offsetHeight)
  glider.style.pixelBottom = 0;    }