请问ASP.NET网页里面嵌入的javascript如何操作控件
比如说改变一个Label的值
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="JSTest.aspx.vb" Inherits="JSTest" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>JSTest</title>
<script language="javascript" type="text/javascript">
function setlabel()
{
document.form1.Label1.value = "123";
}
</script>
</head>
<body onload="setlabel()">
<form id="form1" runat="server">
<asp:Label ID="Label1" runat="server" Text="abc"></asp:Label>
</form>
</body>
</html>
页面开始后还是显示的abc,在javascript里面如何改变Label1的值呢?