function hightlight(item) {
    unHoverAll();
    $('li_' + item).className = "hovered";
    $(item + '_partners').style.display = "block";
}

function unHoverAll() {
    $('li_virtualized_infrastructure').className="";
    $('li_desktops').className="";
    $('li_data_center').className="";
    $('li_secure_networks').className="";
    $('li_mobility').className="";
    $('li_self_service').className="";
    $('li_intelligent_event_processing').className="";

    $('virtualized_infrastructure_partners').style.display="none";
    $('desktops_partners').style.display="none";
    $('data_center_partners').style.display="none";
    $('secure_networks_partners').style.display="none";
    $('mobility_partners').style.display="none";
    $('self_service_partners').style.display="none";
    $('intelligent_event_processing_partners').style.display="none";
}

Event.observe(
    window,
    'load',
    function() {
        Event.observe('li_virtualized_infrastructure', 'mouseover', function() { hightlight("virtualized_infrastructure"); });
        Event.observe('li_desktops', 'mouseover', function() { hightlight("desktops"); });
        Event.observe('li_data_center', 'mouseover', function() { hightlight("data_center"); });
        Event.observe('li_secure_networks', 'mouseover', function() { hightlight("secure_networks"); });
        Event.observe('li_mobility', 'mouseover', function() { hightlight("mobility"); });
        Event.observe('li_self_service', 'mouseover', function() { hightlight("self_service"); });
        Event.observe('li_intelligent_event_processing', 'mouseover', function() { hightlight("intelligent_event_processing"); });

        hightlight("virtualized_infrastructure");

        $('desktops_partners').src="desktops_partners.htm";
        $('data_center_partners').src="data_center_partners.htm";
        $('secure_networks_partners').src="secure_networks_partners.htm";
        $('mobility_partners').src="mobility_partners.htm";
        $('self_service_partners').src="self_service_partners.htm";
        $('intelligent_event_processing_partners').src="iep_partners.htm";
    }

);