img1 = new Image();
img1.src = 'images/voj2.gif';
img2 = new Image();
img2.src = 'images/tiger2.gif';
img3 = new Image();
img3.src = 'images/bf109_2.gif';
img4 = new Image();
img4.src = 'images/ju87_2.gif';
img4 = new Image();
img4.src = 'images/uboot2.gif';


function set_over() {
   this.style.background = '#afa37b';
}

function set_out() {
   this.style.background = '#ECECDD';
}

function thumb_bg() {
   id = document.getElementById('thumbs');
   divs = id.getElementsByTagName('div');
   for(i = 0; i < divs.length; i++) {
      if (divs[i].className != 'align-center clear') {
         divs[i].onmouseover = set_over;
         divs[i].onmouseout = set_out;   
      }
   }
}