Scriptaculous onmouseover event fire delay

I am using scriptaculous to cause images in a menu to grow then shrink again.  There are several images arranged in a vertical column.  I use the following functions, which are called for the events onmouseover and onmouseout:

function popIn(item) {
      new Effect.Scale(item, 64, {scaleFromCenter:true, duration: .1, queue:'end'});
function popOut(item) {
      new Effect.Scale(item, 150, {scaleFromCenter:true, duration: .1, queue:'end'});

When a user starts at the top and moves towards the bottom every image pops out and then in before the image we are looking for...  I want to make it so that prior to actually popping out that the user is required to keep their mouse hovering over the image for a specified amount of time.

The image's code looks like this:

<img src=th_img_74.jpg'  onmouseover = "popOut(this);" onmouseout="popIn(this);" />

The actual url is  Any ideas?  Does this make sense?
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Michel PlungjanIT ExpertCommented:
Perhaps (not tested)

popOutTId = "";
popInTId = "";
item = null;
function popIn() {
      if (item) new Effect.Scale(item, 64, {scaleFromCenter:true, duration: .1, queue:'end'});
function popOut() {
      if (item) new Effect.Scale(item, 150, {scaleFromCenter:true, duration: .1, queue:'end'});
function doPopOut(theItem) {
  item = theItem;
  popOutTId = setTimeout('popOut()',500)
function doPopIn(theItem) {
  item = theItem;
  popInTId = setTimeout('popIn()',500)

<img src=th_img_74.jpg'  
onmouseover = "doPopOut(this);" onmouseout="doPopIn(this);" />

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