function SetupEventHandler()
{
    var NS = (navigator.appName.indexOf("Netscape")!=-1);
    var MS = (navigator.appName.indexOf("Microsoft")!=-1);
    var element = document.getElementById("sidebar");
    if(NS)
    {
        element.addEventListener('mouseover',MainMenuShow,false);
        element.addEventListener('mouseout',MainMenuHide,false);
    }
    if(MS)
    {
        element.attachEvent('onmouseenter', MainMenuShow);
        element.attachEvent('onmouseleave', MainMenuHide);
    }
}