function initTopMenu()
{
    $('#topMenuItems a').mouseenter( function()
    {
        menuID = $(this).parent().attr('id');
        submenuSelectorName = '#si_' + menuID;
        hideTopMenuItems();
        if( $(this).hasClass( 'submenu' ) ) 
            $(this).addClass( 'selected' );
        
        var version = $.browser.version;
        var ifIE = ( $.browser.msie ) ? true : false;
        if( ifIE )
            $( submenuSelectorName ).show();
        else
            $( submenuSelectorName ).fadeIn( 300 );
    });
}

function hideTopMenuItems()
{
    $('#topMenuItems a').removeClass('selected');
    $('.topMenuSubitems').hide();
}