blabla = function() {
if (document.all&&document.getElementById) {
blibli = document.getElementById("navig");
for (i=0; i<blibli.childNodes.length; i++) {
bloblo = blibli.childNodes[i];
if (bloblo.nodeName=="LI") {
bloblo.onmouseover=function() {
this.className+=" over";
  }
  bloblo.onmouseout=function() {
  this.className=this.className.replace(" over", "");
   }
   }
  }
 }
}
window.onload=blabla;