var newWindow;

function openCenteredWindow(url) {
    var width = 800;
    var height = 600;
    var left = parseInt((screen.availWidth/2) - (width/2));
    var top = parseInt((screen.availHeight/2) - (height/2));
    var windowFeatures = "width=" + width + ",height=" + height + ",status=no,resizable=no,toolbar=no, left=" + left + ",top=" + top + "screenX=" + left + ",screenY=" + top;
    newWindow = window.open(url, "advertixx", windowFeatures);
}

function preloadImages() {
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=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];}}
}

preloadImages('../images/btns/btn_products_off.png','../images/btns/btn_company_off.png','../images/btns/btn_contact_off.png','../images/btns/btn_login_off.png','../images/btns/btn_hp_main_off.png','../images/btns/btn_advertisers_off.png','../images/btns/btn_retailers_off.png');