function moveElement(elementID,final_x,final_y,interval) {
  if (!document.getElementById) return false;
  if (!document.getElementById(elementID)) return false;
  var elem = document.getElementById(elementID);
  if (elem.movement) {
    clearTimeout(elem.movement);
  }
  if (!elem.style.left) {
    elem.style.left = "0px";
  }
  if (!elem.style.top) {
    elem.style.top = "0px";
  }
  var xpos = parseInt(elem.style.left);
  var ypos = parseInt(elem.style.top);
  if (xpos == final_x && ypos == final_y) {
    return true;
  }
  if (xpos < final_x) {
    var dist = Math.ceil((final_x - xpos)/10);
    xpos = xpos + dist;
  }
  if (xpos > final_x) {
    var dist = Math.ceil((xpos - final_x)/10);
    xpos = xpos - dist;
  }
  if (ypos < final_y) {
    var dist = Math.ceil((final_y - ypos)/10);
    ypos = ypos + dist;
  }
  if (ypos > final_y) {
    var dist = Math.ceil((ypos - final_y)/10);
    ypos = ypos - dist;
  }
  elem.style.left = xpos + "px";
  elem.style.top = ypos + "px";
  var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";
  elem.movement = setTimeout(repeat,interval);
}

function prepareSlideshow() {
  if (!document.getElementsByTagName) return false;
  if (!document.getElementById) return false;
  if (!document.getElementById("intro")) return false;
  var intro = document.getElementById("intro");
  var slideshow = document.createElement("div");
  slideshow.setAttribute("id","slideshow");
  var frame = document.createElement("img");
  frame.setAttribute("src","images/frame.gif");
  frame.setAttribute("alt","");
  frame.setAttribute("id","frame");
  slideshow.appendChild(frame);
  var preview = document.createElement("img");
  preview.setAttribute("src","images/slideshow.jpg");
  preview.setAttribute("alt","a glimpse of what awaits you");
  preview.setAttribute("id","preview");
  slideshow.appendChild(preview);
  insertAfter(slideshow,intro);
  var links = intro.getElementsByTagName("area");
  for (var i=0; i<links.length; i++) {
    links[i].onmouseover = function() {
      var destination = this.getAttribute("href");
      if (destination.indexOf("#Euphonium1") != -1) {
        moveElement("preview",-150,0,5);
      }
      if (destination.indexOf("#Bflatbass1") != -1) {
        moveElement("preview",-0,0,5);
      }
      if (destination.indexOf("#Flugel") != -1) {
        moveElement("preview",-300,0,5);
      }
      if (destination.indexOf("#Basstrombone") != -1) {
        moveElement("preview",-450,0,5);
      }
      if (destination.indexOf("#Eflatbass1") != -1) {
        moveElement("preview",-600,0,5);
      }
	  if (destination.indexOf("#Firsthorn") != -1) {
        moveElement("preview",-750,0,5);
      }
	  if (destination.indexOf("#Secondhorn") != -1) {
        moveElement("preview",-900,0,5);
      }
	  if (destination.indexOf("#Musicaldirector") != -1) {
        moveElement("preview",-1050,0,5);
      }
	  if (destination.indexOf("#Thirdcornet1") != -1) {
        moveElement("preview",-1200,0,5);
      }
	  if (destination.indexOf("#Firstbaritone") != -1) {
        moveElement("preview",-1350,0,5);
      }
	  if (destination.indexOf("#Principal") != -1) {
        moveElement("preview",-1500,0,5);
      }
	  if (destination.indexOf("#Secondcornet1") != -1) {
        moveElement("preview",-1650,0,5);
      }
	  if (destination.indexOf("#Euphonium2") != -1) {
        moveElement("preview",-1800,0,5);
      }
	  if (destination.indexOf("#Solocornet3") != -1) {
        moveElement("preview",-1950,0,5);
      }
	  if (destination.indexOf("#Thirdcornet2") != -1) {
        moveElement("preview",-2100,0,5);
      }
	  if (destination.indexOf("#Secondtrombone") != -1) {
        moveElement("preview",-2250,0,5);
      }
	  if (destination.indexOf("#Solocornet2") != -1) {
        moveElement("preview",-2400,0,5);
      }
	  if (destination.indexOf("#Solohorn") != -1) {
        moveElement("preview",-2550,0,5);
      }
	  if (destination.indexOf("#Secondcornet2") != -1) {
        moveElement("preview",-2700,0,5);
      }
	  if (destination.indexOf("#sop") != -1) {
        moveElement("preview",-2850,0,5);
      }
	  if (destination.indexOf("#Bflatbass2") != -1) {
        moveElement("preview",-3000,0,5);
      }
	  if (destination.indexOf("#Firsttrombone") != -1) {
        moveElement("preview",-3150,0,5);
      }
	  if (destination.indexOf("#Rep") != -1) {
        moveElement("preview",-3300,0,5);
      }
	  if (destination.indexOf("#Solocornet1") != -1) {
        moveElement("preview",-3450,0,5);
      }
	  if (destination.indexOf("#Percussion") != -1) {
        moveElement("preview",-3600,0,5);
      }
	  if (destination.indexOf("#Secondbaritone") != -1) {
        moveElement("preview",-3750,0,5);
      }
	  if (destination.indexOf("#Eflatbass2") != -1) {
        moveElement("preview",-3900,0,5);
      }
    }
  }
}

addLoadEvent(prepareSlideshow);