function Catalog_search_OnBtnPlus()
{
 oImgs = document.getElementById("Catalog_search_imgs").getElementsByTagName("IMG");
 
 var begin = 0;
 while (oImgs[begin].style.display == "none")
  begin++;
 
 var end = begin;
 while (oImgs[end].style.display != "none")
  end++;
  
 if (oImgs[end+1])
 {
   oImgs[begin].style.display = "none";
   oImgs[begin+1].style.display = "none";
   
   oImgs[end].style.display = "";
   oImgs[end+1].style.display = "";
 }
}

function Catalog_search_OnBtnMinus()
{
 oImgs = document.getElementById("Catalog_search_imgs").getElementsByTagName("IMG");
 
 var begin = 0;
 while (oImgs[begin].style.display == "none")
  begin++;
 
 var end = begin;
 while (oImgs[end].style.display != "none")
  end++;
  
 if (oImgs[begin-2])
 {
   oImgs[begin-1].style.display = "";
   oImgs[begin-2].style.display = "";
   
   oImgs[end-1].style.display   = "none";
   oImgs[end-2].style.display = "none";
 }
}