js 等待效果(只有图片)

css:

#loading{

  position:fixed;

  top:0;

  left:0;

  width:100%;

  height:100%;

  background:rgba(0,0,0,0.3);

  <a href="https://www.baidu.com/s?wd=z-index&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1d-mymkuj0LuARYnhf4Pvw90AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBt3P1fsP10Yn10YrHmsPHbLP1c"
target="_blank" class="baidu-highlight">z-index</a>:15000;}

    #loading img{

    position:absolute;

    top:50%;

    left:50%;

    width:50px;

    height:50px;

    margin-top:-15px;

    <a href="https://www.baidu.com/s?wd=margin-left&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1d-mymkuj0LuARYnhf4Pvw90AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBt3P1fsP10Yn10YrHmsPHbLP1c"
target="_blank" class="baidu-highlight">margin-left</a>:-15px;}

body:

<div id="loading" style="visibility: hidden;">

    <img src="images/wait.gif" width="33" alt="">

    </div>