startList = function() {
    //this condition is only true for IE5.0 and higher
    if (document.all&&document.getElementById) {
        var divs = document.body.getElementsByTagName("div");
        for (i=0; i<divs.length; i++) {
            node = divs[i];
            //nodenames in CAPITAL!
            if (node.nodeName=="DIV") {
                node.onmouseover=function() {
                    this.className+=" over";
                }
                node.onmouseout=function() {
                    this.className=this.className.replace(" over", "");
                }
            }
        }  
    }
}
window.onload=startList;