function article()
   {
      if(document.getElementById("a_mini").style.visibility == "visible")
            {
               document.getElementById("a_mini").style.visibility = "hidden";
               document.getElementById("a_mini").style.position = "absolute";
               document.getElementById("a_big").style.visibility = "visible";
               document.getElementById("a_big").style.position = "static";
            }
         else
            {
               document.getElementById("a_big").style.visibility = "hidden";
               document.getElementById("a_big").style.position = "absolute";
               document.getElementById("a_mini").style.visibility = "visible";
               document.getElementById("a_mini").style.position = "static";
            }
   }