function Elrejt_Hirlev(id1,id2)
 {
   var cb1
   var cb2
   var cb3
   var cb4
   var divid3
   var divid4

      
	   cb1 = id1+"cb";
	   cb2 = id2+"cb";      
	   cb3 = id1+"cb2";
	   cb4 = id2+"cb2";
	   divid3 = id1+"2";
	   divid4 = id2+"2";
	 
          document.getElementById(id1).className = "kibont";
	  document.getElementById(cb1).checked = true;
	  document.getElementById(cb2).checked = false;
	  document.getElementById(id2).className = "osszecsuk";
          document.getElementById(divid3).className = "kibont";
	  document.getElementById(cb3).checked = true;
	  document.getElementById(cb4).checked = false;
	  document.getElementById(divid4).className = "osszecsuk";
 }
//---[Add to bookmark]--------------------------------------

  function addbookmark()
  {
       var bookmarkurl="http://www.konyvmuhely.hu"
       var bookmarktitle="Könyvműhely.hu"

	if (window.sidebar)
        { 
	  window.sidebar.addPanel(bookmarktitle,bookmarkurl,"");         
	}
        else if( document.all )
        {
	  window.external.AddFavorite(bookmarkurl,bookmarktitle);
	}
        else if( window.opera && window.print )
        {
	  return true;
        }
  }


//---[Question Dialog]--------------------------------------

 function Kerdes(question){
  if (confirm(question)) 
    return true
  else
   return false
 }



//---[Check box ellenorzes]--------------------------------------

 function IsChecked1(field,msg){
    with (field)
    {
      if (field.checked == false)
      {
        alert(msg);
        return false
      }
      else
      {
        return true
      }
    }
 }

//---[Képcsere]------------------------------------------------
   browserNev = navigator.appName;
   browserVer = parseInt(navigator.appVersion);

   if (browserNev == "Netscape" && browserVer >= 3)
      browserVer = "1";
   else if (browserNev == "Microsoft Internet Explorer" && browserVer == 4)
      browserVer = "1";
   else browserVer = "2";

   function ImageChange(id,image)
   {
      if (browserVer == 1)
       {
         document.images[id].src = '/images/'+image;
       }
   }