function init() {
  if (!document.getElementById) return
  var imgOriginSrc;
  var imgTemp = new Array();
  var imgarr = document.getElementsByTagName('img');
  for (var i = 0; i < imgarr.length; i++) {
    if (imgarr[i].getAttribute('hsrc')) {
        imgTemp[i] = new Image();
        imgTemp[i].src = imgarr[i].getAttribute('hsrc');
        imgarr[i].onmouseover = function() {
            imgOriginSrc = this.getAttribute('src');
            this.setAttribute('src',this.getAttribute('hsrc'))
        }
        imgarr[i].onmouseout = function() {
            this.setAttribute('src',imgOriginSrc)
        }
    }
  }
}
onload=init;

//preload images
var img = new Array();
img[0] = new Image();
img[0] = 'menu/quality2.gif';
img[1] = new Image();
img[1] = 'menu/home2.gif';
img[2] = new Image();
img[2] = 'menu/coporate2.gif';
img[3] = new Image();
img[3] = 'menu/craftmanship2.gif';
img[4] = new Image();
img[4] = 'menu/contact2.gif';