vbscript function to add items from a treeview node to a listbox

Below is the vbscript function.
I want to display all the items selected from the node(SelectedNode) inside the listbox(lstMultipleFileUpload)which is inside a div tag in the HTML page

Code:

<script language="vbscript" for="FileListTreeView" event="oncheck">
Dim SelectedNode	
Dim str
Set SelectedNode = FileListTreeView.getTreeNode(window.event.TreeNodeIndex)			
str = "" & document.all.item("lstMultipleFileUpload").innerHTML					
If (SelectedNode.getAttribute("Checked") ) Then
str = str & "<DIV class=list>&nbsp;" & SelectedNode.getAttribute("id") & "</DIV>"
Else
str = Replace(str,"<DIV class=list>&nbsp;" & SelectedNode.getAttribute("id") & "</DIV>","")
End If
document.all.item("lstMultipleFileUpload").innerHTML= "" & str			
</script>

 

What is error you are facing??