javascript - setTimeout on mobile browsers doesn't work -

i trying run script in ios safari , android browsers doesnt work, works in desktop browser.

case 4:     if(estado == '1'){             alert('case 4!!');                $('#respuesta').empty();          $('#respuesta').append('well done!<br>that correct.');          $('#estado').val(2);           document.getelementbyid('well_done').play();         //when audio finish, must wait 5 seconds play one.            settimeout(function(){              document.getelementbyid('question_2').play();                   },5000);               } 

i repeat, works in desktop not in mobile.

thanks help.