function disableSelection(target)
{
     if(typeof target.onselectstart!="undefined") //IE route
          target.onselectstart=function(){return false}
     else if (typeof target.style.MozUserSelect!="undefined") //Firefox route
          target.style.MozUserSelect="none"
     else //All other route (ie: Opera)
          target.onmousedown=function(){return true}
          target.style.cursor = "default"
}


var message="Prawy klawisz jest wyłączony!";

///////////////////////////////////
function clickIE4()
{
     if (event.button==2)
     {
          alert(message);
         return false;
     }
}

function clickNS4(e)
{
     if (document.layers||document.getElementById&&!document.all)
     {
          if (e.which==2||e.which==3)
          {
               alert(message);
               return false;
          }
     }
}

if (document.layers)
{
     document.captureEvents(Event.MOUSEDOWN);
     document.onmousedown=clickNS4;
}
else if (document.all&&!document.getElementById)
{
     document.onmousedown=clickIE4;
}