function repl_img(img,ref) {
 if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){
  var ieversion=new Number(RegExp.$1)
  if (ieversion<=6) {
   xShowHide("item_img_big_img");
   document.item_img_big_img.src = img;
   document.item_img_big_img.style.width = xGetElementById(ref).width * 3.26667;
   document.item_img_big_img.style.height = xGetElementById(ref).height * 3.32727;
   xShowHide("item_img_big_img");
  } else {
   document.item_img_big_img.src = img;
  }
 } else {
  document.item_img_big_img.src = img;
 }
}

function xGetElementById(id) {
 var object = null;
 if (document.getElementById) {
  object = document.getElementById(id);
 } else if (document.all) {
  object = document.all[id];
 } else if (document.layers) {
  object = document.layers[id];
 }
 return object;
}

function xShowHide(id){
 var ShowHide = null;
 if (document.getElementById) {
  ShowHide = (document.getElementById(id).style.visibility == 'hidden') ? 'visible' : 'hidden';
  document.getElementById(id).style.visibility = ShowHide;
 } else if (document.all) {
  ShowHide = (document.all[id].style.visibility == 'hidden') ? 'visible' : 'hidden';
  document.all[id].style.visibility = ShowHide;
 } else if (document.layers) {
  ShowHide = (document.layers[id].visibility == 'hide') ? 'show' : 'hide'
  document.layers[id].visibility = ShowHide;
 }
 return false;
}