Watermarks: TextBox.Init

    protected void TextBox1_Init(object sender, EventArgs e)
    {
        // get the text box
        TextBox tb=(sender as TextBox);

        // read the ASP tooltip as the watermark text
        string defaulttext = tb.ToolTip;

        // if the field is blank, set text to the tooltip
        // this only fires of on init of the page, not as
        // the user is navigating around on it.
        if (tb.Text == "") { tb.Text = tb.ToolTip; }

        // hook up the JavaScript events to the screen objects.
        tb.Attributes.Add("onFocus", "doClear(this)");
        tb.Attributes.Add("onBlur", "doBlur(this)");

        //init the screen objects (only on init)
        if (tb.Text == "")
        {
            tb.CssClass = "watermarked";
            tb.Text = tb.ToolTip;
        }
        else
        {
            TextBox1.CssClass = "unwatermarked";
        }
    }