web页面中按钮执行处理时间过长，添加div等待层，提升用户体验
JavaScript 文件：
var coverLayer = {
divObj : null,
_coverTime : null,
// _coverRe : function()
// {//刷新遮盖层
// this.divObj.style.width = window.screen.availWidth + "px";
// this.divObj.style.height = window.screen.availHeight + "px";
// },
on : function(noSave)
{ //打开遮盖层
if(this.divObj == null)
{
this.divObj = document.createElement("div");
this.divObj.style.zIndex = 10000;
this.divObj.style.left = '0px';;
this.divObj.style.top = '0px';;
this.divObj.style.position = "absolute";
this.divObj.style.backgroundColor = "#FFFFFF";
this.divObj.style.fontSize = "x-large";
this.divObj.style.color = "#ff0000";
this.divObj.style.textAlign ="center";
this.divObj.innerText="处理中……";
var tempFrame = document.createElement("iframe");
tempFrame.style.filter = "Alpha(Opacity=0)";
tempFrame.frameBorder=0;
tempFrame.scrolling="no";
tempFrame.style.width = "100%";
tempFrame.style.height = "100%";
this.divObj.appendChild(tempFrame);
this.divObj.style.filter = "Alpha(Opacity=80)";
document.body.appendChild(this.divObj);
};
this.divObj.style.width = document.documentElement.clientWidth + "px";
this.divObj.style.height = document.documentElement.clientHeight + "px";
this.divObj.style.paddingTop =document.documentElement.clientHeight / 2 + "px";
this.divObj.style.display = "block";
// clearInterval(this._coverTime);
//this._coverTime = setInterval("coverLayer._coverRe()",1);
},
off : function(noSave)
{ //关闭遮盖层
if(this.divObj){this.divObj.style.display = "none"};
//clearInterval(this._coverTime);
}
}
调用
OnClientClick="coverLayer.on();"
