提交表单弹出层

function showdiv() {
var str = "<br /><img src='http://www.cnblogs.com/Images/loading.gif' alt='图片加载中...' title='正在导入请稍后...' /><br /><br />正在导入请稍后！"; //这里是内容
var msgw, msgh, bordercolor;
msgw = 400; //宽度
msgh = 150; //高度
titleheight = 25;
bordercolor = "#B7DBF2"; //提示窗口的边框颜色
titlecolor = "#B7DBF2"; //提示窗口的标题颜色 #c51100
var sWidth, sHeight;
// sWidth = screen.width;
// sHeight = screen.height;
sWidth = "600";
sHeight = "200";
var bgObj = document.createElement("div");
bgObj.setAttribute('id', 'bgDiv');
bgObj.style.position = "absolute";
bgObj.style.top = "0";
bgObj.style.background = "#cccccc"; //页面背景颜色
bgObj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=55";
bgObj.style.opacity = "0.6";
bgObj.style.left = "0";
bgObj.style.width = sWidth + "px";
bgObj.style.height = sHeight + "px";
bgObj.style.zIndex = "100";
document.body.appendChild(bgObj);
var msgObj = document.createElement("div")
msgObj.setAttribute("id", "msgDiv");
msgObj.setAttribute("align", "center");
msgObj.style.background = "white";
msgObj.style.border = "1px solid " + bordercolor;
msgObj.style.position = "absolute";
msgObj.style.left = "35%";
msgObj.style.top = "40%";
msgObj.style.font = "12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";
msgObj.style.marginLeft = "-100px";
msgObj.style.marginTop = -75 + document.documentElement.scrollTop + "px";
msgObj.style.width = msgw + "px";
msgObj.style.height = msgh + "px";
msgObj.style.textAlign = "center";
msgObj.style.lineHeight = "25px";
msgObj.style.zIndex = "101";
var title = document.createElement("h5");
title.setAttribute("id", "msgTitle");
title.setAttribute("align", "right");
title.style.margin = "0";
title.style.padding = "3px";
title.style.background = bordercolor;
title.style.filter = "progid:DXImageTransform.Microsoft.Alpha(startX=10, startY=10, finishX=50, finishY=50,style=1,opacity=35,finishOpacity=75);";
title.style.opacity = "0.75";
title.style.border = "1px solid " + bordercolor;
title.style.height = "18px";
title.style.font = "12px Verdana, Geneva, Arial, Helvetica, sans-serif";
title.style.color = "white";
title.style.cursor = "pointer";
title.innerHTML = "关闭";
title.onclick = function () {
document.body.removeChild(bgObj);
document.getElementById("msgDiv").removeChild(title);
document.body.removeChild(msgObj);
}
document.body.appendChild(msgObj);
document.getElementById("msgDiv").appendChild(title);
var txt = document.createElement("p");
txt.style.margin = "1em 0"
txt.setAttribute("id", "msgTxt");
txt.innerHTML = str;
document.getElementById("msgDiv").appendChild(txt);
}