主题：[求助]AddUploader能否通过javascript更改属性

不可以，设置的属性不同，生成的html代码不同的。你可以都设置成true的方式（可以编辑的方式），然后用js控制隐藏/显示某一些元素。

我测试没问题

Select Case e.Path
    Case "test.htm", ""
        Dim wb As New weui
        wb.AddForm("","form1","123.htm?test=123abc") '指定接收表单数据的的页面为handle.htm
        With wb.AddInputGroup("form1","ipg1","客户资料")
            .AddInput("姓名","姓名","text").value = "舒淇"
            .AddInput("地点","地点","text").Value = "蒙古草原"
            .AddInput("日期","日期","date").value = #10/12/2012#
            With .AddUploader("up1","",True)
                .AllowDelete = True '允许删除
                .Incremental = False '允许重复选择文件或连续拍照
                .AllowAdd = True '关闭文件上传功能
                .AddImage("./images/001.jpg")
                .AddImage("./images/002.jpg")
                .AddImage("./images/003.jpg")
            End With
        End With
        With wb.AddButtonGroup("form1","btg1",True)
            .Add("btn1", "确定", "button").Attribute = "onclick=""up1_gallery.children[1].children[0].children[0].style.display='block'"""
        End With
        wb.AppendHTML("<script>up1.parentNode.style.display='none';up1_gallery.children[1].children[0].children[0].style.display='none'</script>")
        e.WriteString(wb.Build)
End Select

你的代码要改成类似

document.getElementById("名片正面_gallery").children[1].children[0].children[0].style.display = "block";  

注意大小写 http://www.w3school.com.cn/jsref/prop_text_readonly.asp