function change_img(p_src)
{
  if (document.images)
  {
    document.img_box.src = "images/" + p_src;
  }

}
function change_img1(p_src)
{
  if (document.images)
  {
    document.img_box1.src = "images/" + p_src;
  }

}
function change_img2(p_src)
{
  if (document.images)
  {
    document.img_box2.src = "images/" + p_src;
  }

}
function change_img3(p_src)
{
  if (document.images)
  {
    document.img_box3.src = "images/" + p_src;
  }

}

function change_img4(p_src)
{
  if (document.images)
  {
    document.img_box4.src = "images/" + p_src;
  }

}