var isNS = false;
var isIE = false;
if (document.layers) isNS=true;
if (document.all) isIE=true;

function getObject(id) {
   if (isNS) obj="document."+id;
   if (isIE) obj=id+".style";
   var object=eval(obj);
   return object;
}

function clipIt(o, t, r, b, l) {
   var object=getObject(o);
   if (isNS) {
      object.clip.top=t;
      object.clip.right=r;
      object.clip.bottom=b;
      object.clip.left=l;
   }
   if (isIE) {
      object.clip="rect("+t+" "+r+" "+b+" "+l+")";
   }
}