precedence of execution

Hi

This code below gives at the end label1 = "via jv". I was expecting label1 = "via code".

So why is it "via jv"? I thought the order of execution was:

1) aspx file with javascript => "via jv"

2) code-behind.=> "via code"

Thanks

 <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<script type="text/javascript">
        document.getElementById("Label1").textContent = "via jv";
    </script>
protected void Page_Load(object sender, EventArgs e)
        {
            Label1.Text = "via code";
        }