After reading this group history and other google sources I came into the conclusion that it would not be possible to simulate the click by trigger("click"). Anyway, here is the code that is working fine for me. Maybe useful for someone.
Thanks for help. Brgs Norbert $("#menu_ma a") .click(function(e,arg){ $(this).closest("li.ui-selectee").addClass("ui-selected").siblings ().removeClass("ui-selected"); if($(this).attr("target")){ window.open($(this).attr("href"),$(this).attr("target"),""); return false; } else location.href = $(this).attr("href"); }) $("#menu_ma li") .hover( function(){ $(this).addClass("ui-state-highlight cursor-pointer"); }, function(){ $(this).removeClass("ui-state-highlight cursor-pointer"); }) .click(function(e,a){ var link = $(this).find("a"); if(a == undefined) link.trigger('click','manual') else return true; })