这个新弹出的div 为什么不显示form

Question

<script language="javascript">
var docEle = function() {
return document.getElementById(arguments[0]) || false;
}
function openNewDiv(_id) {
var m = "mask";
if (docEle(_id)) document.removeChild(docEle(_id));
if (docEle(m)) document.removeChild(docEle(m));

var newDiv = document.createElement("div");
newDiv.id = _id;
newDiv.style.position = "absolute";
newDiv.style.zIndex = "9999";
newDiv.style.width = "500px";
newDiv.style.height = "300px";
newDiv.style.top = "50px";
newDiv.style.left = (parseInt(document.body.scrollWidth) - 300) / 2 + "px"; // 屏幕居中
newDiv.style.background = "#EFEFEF";
newDiv.style.border = "1px solid #860001";
newDiv.style.padding = "5px";
newDiv.innerHTML = "新激活图层内容&nbsp;&nbsp;&nbsp;&nbsp;";
document.body.appendChild(newDiv);
// mask图层
var newMask = document.createElement("div");
newMask.id = m;
newMask.style.position = "absolute";
newMask.style.zIndex = "1";
newMask.style.width = document.body.scrollWidth + "px";
newMask.style.height = document.body.scrollHeight + "px";
newMask.style.top = "0px";
newMask.style.left = "0px";
//newMask.style.background = "#000";
newMask.style.filter = "alpha(opacity=40)";
newMask.style.opacity = "0.40";
document.body.appendChild(newMask);

// 关闭mask和新图层
var newA = document.createElement("a");
newA.href = "#";
newA.innerHTML = "关闭";
newA.onclick = function() {
document.body.removeChild(docEle(_id));
document.body.removeChild(docEle(m));
return false;
}
newDiv.appendChild(newA);
}

var dlform = document.createElement('form');
dlform.style = "display:block;";
dlform.method = 'post';
dlform.action = '../fileServlet';
dlform.target = '_blank';
dlform.encding="multipart/form-data"

//dlform.enctype="multipart/form-data"

var hdnFilePath = document.createElement('input');
hdnFilePath.type = 'hidden';
hdnFilePath.name = 'filePath';
hdnFilePath.value = filePath;
dlform.appendChild(hdnFilePath);

var hdnFile = document.createElement('input');
hdnFile.type = 'file';
hdnFile.name = 'fs';
dlform.appendChild(hdnFile);

var btnsubmit = document.createElement('input');
btnclose.type = 'submit';
btnclose.name = 'btnsubmit';
dlform.appendChild(btnsubmit );
 

var btnclose = document.createElement('input');
btnclose.type = 'button';
btnclose.name = 'btnclose';
btnclose.onclick=function() {
document.body.removeChild(docEle(_id));
document.body.removeChild(docEle(m));
return false;
}
dlform.appendChild(btnclose);

newDiv.appendChild(dlform)

//document.body.appendChild(dlform);
//dlform.submit();
//document.body.removeChild(dlform);

</script>
<a href="#" onclick="openNewDiv('newDiv');return false;">激活新层</a>

Answer 1

dlform.style = "display:block;";// ??
//改为
dlform.style.display="block";