std1 = new Image();
std1.src = "english/image1a.jpg";
over1 = new Image();
over1.src = "english/image1b.jpg";

std2 = new Image();
std2.src = "english/image2a.jpg";
over2 = new Image();
over2.src = "english/image2b.jpg";

std3 = new Image();
std3.src = "english/image3a.jpg";
over3 = new Image();
over3.src = "english/image3b.jpg";

std4 = new Image();
std4.src = "english/image4a.jpg";
over4 = new Image();
over4.src = "english/image4b.jpg";

std5 = new Image();
std5.src = "english/image5a.jpg";
over5 = new Image();
over5.src = "english/image5b.jpg";

function imageChange(imagenr,imageobj)
{
  window.document.images[imagenr].src = imageobj.src;
}