var images = new Array() images[0] = 'home_photo1.jpg' images[1] = 'home_photo2.jpg' images[2] = 'home_photo3.jpg' images[3] = 'home_photo4.jpg' var i = 0; var p = images.length; var preBuffer = new Array() for (i = 0; i < p; i++){ preBuffer[i] = new Image() preBuffer[i].src = images[i] } var whichImage = Math.round(Math.random()*(p-1)); function showImage(){ document.write(''); } function swap (name,over) { if(window.document.images) { if (over) window.document.images[name].src = "images/" + name + "_on.gif"; else window.document.images[name].src = "images/" + name + ".gif"; } }