function preload() {
    var brochure = new Array();
    var pics = preload.arguments;
    var dir = '/images/img/img_' // path to images
    for (i=0;i<pics.length;i++) {
          brochure[i] = new Image();
          brochure[i].src = dir + pics[i] + '.jpg'; // change file extension, if necessary.
        // uncomment next line for testing; click OK to continue loop and cancel to break
        // if(!confirm(brochure[i].src)) break;
    }
}

// call the function with the list of images (unique part of names)

// Multiple onload function created by: Simon Willison
// http://simon.incutio.com/archive/2004/05/26/addLoadEvent
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(function() {
    preload('builders-media-img-06-b.jpg','builders-media-img-07-b','builders-media-img-08-b','builders-media-img-09-b');
});