sfHover = function() {
          if(document.getElementById("nav")) {
              var sfEls = document.getElementById("nav").getElementsByTagName("LI");
              for (var i=0; i<sfEls.length; i++) {
                  sfEls[i].onmouseover=function() {
                      this.className+=" over";
                      if(document.getElementById("menu_iframe")) {
                          var iframe = document.getElementById("menu_iframe");
      
                          var submenu = this.getElementsByTagName("UL");
                          if(submenu.length) {
                              iframe.style.top = submenu[0].offsetTop + this.offsetTop;
                              iframe.style.left = submenu[0].offsetLeft + this.offsetLeft;
                              iframe.style.width = submenu[0].scrollWidth;
                              iframe.style.height = submenu[0].clientHeight;
                              iframe.style.display = "inline";
                          }
                      }
                  }
                  sfEls[i].onmouseout=function() {
                      this.className=this.className.replace(new RegExp(" over\\b"), "");
                      if(document.getElementById("menu_iframe")) {
                          var iframe = document.getElementById("menu_iframe");
                          iframe.style.display = "none";
                      }
                  }
              }
          }
      }
      if (window.attachEvent) window.attachEvent("onload", sfHover);