问题遇到的现象和发生背景
我通过vba代码操作IE，添加了一个按钮，并且绑定了onclick()对象，但是点击无效。
问题相关代码，请勿粘贴截图
```vb.net
Sub vba添加元素()
Dim roIe As Object
Set roIe = CreateObject("internetExplorer.application")
roIe.Visible = True
' roIe.Navigate ("c:\tiaoshi.html")
roIe.Navigate ("c:\linshi.html")
Do Until roIe.ReadyState = 4
DoEvents
Loop
Stop
Set doc = roIe.Document
Set ele3 = doc.createElement("input")
ele3.Value = "new"
ele3.ID = "new"
ele3.onclick = "tt()"
ele3.Type = "button"
doc.body.appendChild (ele3)
'doc.getElementById("new").Click '这样操作也无效
End sub
linshi.html代码如下
```html
<html>
<head>
<script type="text/javascript">
function tt() {
alert("fafaf");
}
</script>
</head>
<body>
<input id="3" type="button" value="tt" onclick="tt()"><br>
</body>
</html>
