var ua = navigator.userAgent;
var ual = ua.toLowerCase();
var brokenHover = (ual.indexOf("msie") != -1);

function subMenu( show, menuNumber ) {
   if (show) {
      if (brokenHover) {
         var sMenu = document.getElementById('subMenu' + menuNumber);
         sMenu.style.display = "block";
      }
   } else {
      if (brokenHover) {
         var sMenu = document.getElementById('subMenu' + menuNumber);
         sMenu.style.display = "none";
      }
   }
}