function suckerfish(){
 if(document.all&&document.getElementById){
  var navRoot=document.getElementById("nav"),node,i;
  navRoot=navRoot.getElementsByTagName("ul");
  navRoot=navRoot[0];
  for(i=0;i<navRoot.childNodes.length;i++){
   node=navRoot.childNodes[i];
   if(node.nodeName=="LI"){
    node.onmouseover=function(){
     this.className+=" suckerfish";
    }
    node.onmouseout=function(){
     this.className=this.className.replace(" suckerfish","");
}}}}}