Question

I am using image maps to hover some images in a slider, works well but there is a flicker until it loads once, then it works well. Anyone knows why is this happening?

BY the way, it happens only in FIREFOX

<script>
    Image1 = new Image()
    Image1.src = "images/slide1aroll.jpg"
    function firstmap() {
        document.emp.src = Image1.src; 
        return true;
    }
</script>

<li style="width: 480px; height: 610px;"><img src="images/slide1a.jpg" name="emp" id="emp" class="emp" width="480" height="610" usemap="#model1" style="display:block; border:none;" border="0" /></li>
<map name="model1" id="model1" name="model1">
    <area shape="rect" coords="31,6,289,576" href="#" onmouseover="firstmap();" onmouseout="document.emp.src = 'images/slide1a.jpg';" alt=""/>
    <area shape="rect" coords="303,9,475,605" href="#" onmouseover="firstmap2();" onmouseout="document.emp.src = 'images/slide1a.jpg';" />
</map>

Answer 1

Do caching of the image

<div style="display: none">
    <img src="image1.png" />
    <img src="image2.png" />
    <img src="image3.png" />
</div>  

With this you have all your image present at the first go. It will not flicker now. Try it