function preload() {
 	var brochure = new Array();
 	var pics = preload.arguments;
 	var dir = '/images/gallery1/' // 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('gallery2','gallery3','gallery4');
});