if (document.images) {
  i1on = new Image();
  i1on.src = "images/en/home0.jpg";
  i2on = new Image();
  i2on.src = "images/en/companyinfo0.jpg";
  i3on = new Image();
  i3on.src = "images/en/productinfo0.jpg";
  i4on = new Image();
  i4on.src = "images/en/equipment0.jpg";
  i5on = new Image();
  i5on.src = "images/en/online0.jpg";

  i1off = new Image();
  i1off.src = "images/en/home1.jpg";
  i2off = new Image();
  i2off.src = "images/en/companyinfo1.jpg";
  i3off = new Image();
  i3off.src = "images/en/productinfo1.jpg";
  i4off = new Image();
  i4off.src = "images/en/equipment1.jpg";
  i5off = new Image();
  i5off.src = "images/en/online1.jpg";

}
function changeImages()
        {if (document.images)
                {for (var i=0; i<changeImages.arguments.length; i+=2)
                        {document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
                            }
                  }
        }