$("document").ready(function(){
  $("div.almenu").css("display","none");
  $("#szolgmenu").click(function(){
     $(this).next().next().slideToggle("fast");
  }).mouseover(function(){
     $(this).next().next().slideDown("fast");
  });
});

function restrict(jsObj,regex){
  jsObj.keypress(function(e){
    return e.which == 0 || e.which == 8 || regex.test(String.fromCharCode(e.which)+jsObj.val());
  });
}