BrowserDescription = function () 
{
  this.ua = navigator.userAgent.toLowerCase();
  return this;
}

var browser = new BrowserDescription();


function startmenu(index)
{
  if (browser.ua.indexOf('msie') != -1) {
    //alert(index);
    document.getElementById(index).style.left = "0px";
  }
}

function stopmenu(index)
{
  if (browser.ua.indexOf('msie') != -1) {
    //alert(index);
    document.getElementById(index).style.left = "-9999px";
  }
}