function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function preloadImages()
{
 MM_preloadImages('img/company_o.jpg', 'img/brands_o.jpg', 'img/sponsorship_o.jpg', 'img/publications_o.jpg');
 MM_preloadImages('img/company.jpg', 'img/brands.jpg', 'img/sponsorship.jpg', 'img/publications.jpg');
 document.getElementById("panelContainer").style.display = "block";
}