完美实现加载转圈圈效果：
js代码:
function showLoading(show){if(show){document.getElementById("over").style.display = "block";document.getElementById("layout").style.display = "block";}else{document.getElementById("over").style.display = "none";document.getElementById("layout").style.display = "none";}
}
样式：
.overLoading {
display: none;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #f5f5f5;
opacity:0.5;
z-index: 1000;
}
.layoutLoading {
display: none;
position: absolute;
top: 40%;
left: 40%;
width: 20%;
height: 20%;
z-index: 1001;
text-align:center;
}
html:
看懂了吗？还缺少一张图！附件下载
