function disableEnterKey(e)
{
     var key;

     if(window.event)
          key = window.event.keyCode;     //IE
     else
          key = e.which;     //firefox

     if(key == 13)
          return false;
     else
          return true;
}

function set_jellap(mszam)
{
	var cw = document.getElementsByTagName("iframe")[0].contentWindow;
	cw.document.getElementById("kurzus").value=mszam;
    cw.mszamselect_change(null);
}