主题：getElementById取不到值,请教啥问题？

移动端代码：

Dim e As RequestEventArgs = args(0)
Dim wb As WeUI = Args(1)
wb.AddPageTitle("","pageheader","买入信息","")
wb.AddTopTips("","toptip2","")
wb.AddForm("","buyinfo","buysave.html").Attribute=""
If e.GetValues.ContainsKey("m") Then
    Dim dr As DataRow= DataTables("资金").Find("用户='" & args(2) & "'")   
    With wb.AddInputGroup("buyinfo","ipg1","准确记录买入数据")
        .AddHidenValue("用户",args(2))
        .AddHidenValue("余额",dr("余额"))  '经验证余额是>0的;
        With .AddInput("名称","名称","text")
            .Value = e.GetValues("m")
            .Readonly=True
        End With
       
        With .AddInput("价格","价格","number")
            .Required=True
            .Step = "0.01"
        End With
        With .AddInput("数量","数量","number")
            .Required=True
        End With
    End With
Else
    wb.AddTopTips("","toptip1","数据有误!").msec = 2000
End If
With wb.AddButtonGroup("buyinfo","btg1",False)
    .Add("btn1", "保存", "submit")
End With
wb.AppendHTML("<script src='./lib/ajaxform.js'></script>") '引入脚本文件
e.WriteString(wb.Build)

Js文件代码：

function Validit(){
alert(1);

alert(document.getElementById("价格").value);
   var v1 = document.getElementById("余额").value;
   var v2 = document.getElementById("价格").value;
   var v3 = document.getElementById("数量").value;
   if (v1-v2*V3>0){return true}
   showTopTips("toptip2","余额不足!",2500);
   return false;
}