var agt   = navigator.userAgent.toLowerCase();
var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
function hide(elmnt) {
  if( !is_ie ) return;
  var a = elmnt.getElementsByTagName("div");
  var div = a[0];
  elmnt.style.zIndex = 1;
  div.style.display = "none";
}
function show(elmnt) {
  if( !is_ie ) return;
  var a = elmnt.getElementsByTagName("div");
  var div = a[0];
  elmnt.style.zIndex = 100;
  div.style.display = "block";
}