复制代码 代码如下:

function initialize() {

addcloud(); //为页面添加遮罩

document.onreadystatechange = subSomething; //监听加载状态改变

}

function addcloud() {

var bodyWidth = document.documentElement.clientWidth;

var bodyHeight = Math.max(document.documentElement.clientHeight, document.body.scrollHeight);

var bgObj = document.createElement("div" );

bgObj.setAttribute( 'id', 'bgDiv' );

bgObj.style.position = "absolute";

bgObj.style.top = "0";

bgObj.style.background = "#000000";

bgObj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75" ;

bgObj.style.opacity = "0.5";

bgObj.style.left = "0";

bgObj.style.width = bodyWidth + "px";

bgObj.style.height = bodyHeight + "px";

bgObj.style.zIndex = "10000"; //设置它的zindex属性，让这个div在z轴最大，用户点击页面任何东西都不会有反应|

document.body.appendChild(bgObj); //添加遮罩

var loadingObj = document.createElement("div");

loadingObj.setAttribute( 'id', 'loadingDiv' );

loadingObj.style.position = "absolute";

loadingObj.style.top = bodyHeight / 2 - 32 + "px";

loadingObj.style.left = bodyWidth / 2 + "px";

loadingObj.style.background = "url(../img/loading.gif)" ;

loadingObj.style.width = "32px";

loadingObj.style.height = "32px";

loadingObj.style.zIndex = "10000";

document.body.appendChild(loadingObj); //添加loading动画-

}

function removecloud() {

$( "#loadingDiv").remove();

$( "#bgDiv").remove();

}

function subSomething() {

if (document.readyState == "complete" ) //当页面加载完毕移除页面遮罩，移除loading动画-

{

removecloud();

}

}