Mine

<script type="text/javascript">
    function getImage(id, newUrl)
    {
        var img = document.createElement("img");
        img.onload = function (evt)
        {
            document.getElementById(id).src=this.src;
            document.getElementById(id).width=this.width;
            document.getElementById(id).height=this.height;
        }
        img.src = newUrl;
    }

    function setPersonPopupDisplay(evt)
    {
        if (!evt)
        {
            evt = window.event;
        }
        getImage("popup_photo_image", "/displayImage?" + id);