Hi all,
I have made some kind of tooltip so that when hovering over an image, a larger image is displayed on top of that. It works all fine if I show that large image somewhere in the screen where my mousepointer is not present. However, in my final version that would not be possible as the image (as I said) must be on top of another one which I'm "onmouseover"-ing.

When my mousepointer is over the big image, it starts to flicker in firefox, while in IE it disappears totally.
Could someone help me out here please?

Code:
function showFullImage(thumbnail, imgurl) {
	var div = document.getElementById('dbimgpopup');
	if (div.style.visibility == 'hidden') {
		var x = findPosX(thumbnail)  + 100; // + 200 - 350;
		var y = findPosY(thumbnail);
		div.style.left = x + 'px';
		div.style.top = y + 'px';
		div.innerHTML = '<img src="' + imgurl + '"/>';
		div.style.visibility = 'visible';
	}
	return false;
}

function hideFullImage() {
	var div = document.getElementById('dbimgpopup');
	div.innerHTML = '';
	div.style.visibility = 'hidden';
	
	return false;
}
That element div it finds is a <div> with z-index:10, position:absolute, visibility: hidden.

Thank you