javascript - 同时淡入淡出

Question

下面的代码有效，但新图像不会淡入，直到前一个图像淡出。我希望它们同时淡入和淡出，使新图像看起来好像在旧图像上淡出。

html

<img id="BiblesandCommentaries_bg" src="_\images\backgrounds\BiblesandCommentaries_bg.jpg"/>
<img id="EnquirersLibrary_bg" src="_\images\backgrounds\EnquirersLibrary_bg.jpg"/>
<img id="NewBelievers_bg" src="_\images\backgrounds\NewBelievers_bg.jpg"/>
<img id="ChristianLiving_bg" src="_\images\backgrounds\ChristianLiving_bg.jpg"/>
<img id="FamilyLibrary_bg" src="_\images\backgrounds\FamilyLibrary_bg.jpg"/>
<img id="YoungAdultLibrary_bg" src="_\images\backgrounds\YoungAdultLibrary_bg.jpg"/> 
<img id="WorshipLibrary_bg" src="_\images\backgrounds\WorshipLibrary_bg.jpg"/>
<img id="BibleTeachings_bg" src="_\images\backgrounds\BibleTeachings_bg.jpg"/>
<img id="Leadership_bg" src="_\images\backgrounds\Leadership_bg.jpg"/>
<img id="SchoolofChrist_bg" src="_\images\backgrounds\SchoolofChrist_bg.jpg"/>

js

$('#sidebar a').click(function() {
    $('#BiblesandCommentaries_bg, #EnquirersLibrary_bg, #NewBelievers_bg, #ChristianLiving_bg, #FamilyLibrary_bg, #YoungAdultLibrary_bg, #WorshipLibrary_bg, #BibleTeachings_bg, #Leadership_bg, #SchoolofChrist_bg').fadeTo("slow", 0);
    bgImage = $(this).attr('href')+'_bg';
    $(bgImage).fadeTo("slow", 1);
});

Answer 1

当你在元素上调用淡入动画时，另一个淡出动画仍在执行，所以尽量不要淡出应该淡入的元素。代码是这样的:(我添加了.not( bgImage) 的一部分。)

$('#sidebar a').click(function() {
     var bgImage = $(this).attr('href')+'_bg';    
     $('#BiblesandCommentaries_bg, #EnquirersLibrary_bg, #NewBelievers_bg, #ChristianLiving_bg, #FamilyLibrary_bg, #YoungAdultLibrary_bg, #WorshipLibrary_bg, #BibleTeachings_bg, #Leadership_bg, #SchoolofChrist_bg').not(bgImage).fadeTo("slow", 0);    
     $(bgImage).fadeTo("slow", 1);
});