if (document.images) {
 img1 = new Image();
 img1.src = 'images/butn_casestudies_on.jpg';
 img2 = new Image();
 img2.src = 'images/butn_clientindustries_on.jpg';
 img3 = new Image();
 img3.src = 'images/butn_contactus_on.jpg';
 img4 = new Image();
 img4.src = 'images/butn_executiveteam_on.jpg';
 img5 = new Image();
 img5.src = 'images/butn_home_on.jpg';
 img6 = new Image();
 img6.src = 'images/butn_logistics_on.jpg';
 img7 = new Image();
 img7.src = 'images/butn_mission_on.jpg';
 img8 = new Image();
 img8.src = 'images/butn_partnerlinks_on.jpg';
 img9 = new Image();
 img9.src = 'images/butn_whyredstreak_on.jpg';
 img10 = new Image();
 img10.src = 'subpage_banner.jpg';
 img11 = new Image();
 img11.src = 'subpage_logo.jpg';
}