It's been more than 10 years and not sure if anyone still finding this question or answer relevant.
But a quick workaround is just to wrap the asp control within a html container
<div id="myElement" style="display: inline-block">
<asp:TextBox ID="textBox1" runat="server"></asp:TextBox>
</div>
Whenever the Javascript Event is triggered, if it needs to be an event by the asp control, just wrap the asp control around the div container.
<div id="testG">
<asp:Button ID="Button2" runat="server" CssClass="btn" Text="Activate" />
</div>
The jQuery Code is below:
$(document).ready(function () {
$("#testG").click(function () {
$("#myElement").css("display", "none");
});
});