为什么按钮的标题没有变
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><SCRIPT language="javascript">
function ShowEagle()
{
Form1.btnShowEagle.Value="open"
alert(document.all.btnShowEagle.value)
alert(Form1.btnShowEagle.value)
}
</SCRIPT>
<HTML>
<HEAD>
<title>head</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<INPUT type="button" value="close" onclick="ShowEagle()" name="btnShowEagle" id="btnShowEagle"></form>
</body>
</HTML>
我希望点击按钮以后按钮上的文字变成open
但是alert出来的是“close”,按钮上面的文字没有变,为什么?