<p align="right">
<asp:TextBox id="tb" runat="server"/>
</p>***********************************************************************
<style type="text/css">
INPUT
{
text-align: right;
}
</style> <asp:TextBox id="TextBox1" runat="server" CssClass="INPUT"></asp:TextBox>
<asp:TextBox id="tb" runat="server"/>
</p>***********************************************************************
<style type="text/css">
INPUT
{
text-align: right;
}
</style> <asp:TextBox id="TextBox1" runat="server" CssClass="INPUT"></asp:TextBox>
<asp:TextBox id="tb" runat="server"/>
</p>
或
<asp:TextBox id="TextBox1" runat="server" CssClass="INPUT" style="text-align:right;"></asp:TextBox>