javascript - Jquery Code Sinppets to Solve -

can tell me possible solutions these??

question 1: web page form id "my_form" , few elements class "excluded" applied. how can make copy of form , rid of elements excluded class, new copy of form?

question 2: examine code snippet. think it's supposed do? why doesn't work? how fix it?

$("li").each(function () {     if ($(this).find("ul")) {         $(this).css("background-color", "gray");     } else {         $(this).css("background-color", "white");     } }); 

question 3: user complaining audio playing after hitting play/pause button. given below implementation, why happen? how fix it?

// pause button implementation: $("#toggleplaypause").on("click", function () {     if (audio.paused === true) {         audio.play();     } else {         audio.pause();     } });  // when current audio has played way through, read next element. audio.addeventlistener("ended", function () {     if (audio.paused === false) {         var nextelement = _getnextelement();          // scroll page next element we're reading @ top of browser window.         $(window).animate(scrolltop: nextelement.offset().top, 400, function () {             _playelementaudio(nextelement);         });     } }); 

any appreciated..

question 1

 $("#form").not(".excluded").clone().appendto("#anotherform");