function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

var ELEM = null

function moveElement(elementID,final_x,final_y,interval) {
  if (ELEM == null) ELEM = document.getElementById(elementID);
  if (!document.getElementById(elementID)) return false;
  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("linklist")) return false;
  if (!document.getElementById("preview")) return false;
  var preview = document.getElementById("preview");
  preview.style.position = "relative";
  preview.style.left = "0px";
  preview.style.top = "0px";


var list = document.getElementById("linklist");
  var links = list.getElementsByTagName("a");
  links[0].onmouseover = function() {
  	moveElement("preview",0,0,100);
  }
  links[1].onmouseover = function() {
  	moveElement("preview",-1055,0,100);
  }
  links[0].onmouseout = links[1].onmouseout = function() { clearTimeout (ELEM.movement); }
}

addLoadEvent(prepareSlideshow);