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(); } }