用js实现前台获取后台变量并点击显示

后台代码

public string s0;
    protected void Page_Load(object sender, EventArgs e)
    {
        string s1 = "123456";
        s0 = s1;
    }

js代码

<script type="text/javascript">
    function Show(){
        var s2='<%=s0 %>';
        document.getElementById('lblShow').innerHTML=s2;
    }
    </script>

前台代码

<div>
         <a href="#" onclick="Show()">显示</a>
    </div>
    <div id="ShowDiv">
        <asp:Label ID="lblShow" runat="server" Text="Label"></asp:Label>
    </div>