Click event function call

Question

I want to call function on imagebutton click.

 

this is the code that doesn't work. What's wrong?

<table>
<tr>
<td>
<asp:TextBox ID="txtSearch" runat ="server" Visible ="false" ClientIDMode="Static" />
<asp:ImageButton ID="imgSearch" runat="server"
OnClientClick ="return txtSearchAnim();"
ImageUrl="../Resources/Images/search2.png" />
</td>
</tr>
</table>
<script type="text/javascript">
function txtSearchAnim() {
var x = document.getElementById("txtSearch");
if (x.style.display === "none") {
x.style.display = "block";
} else {
x.style.display = "none";
}
$('#txtSearch').addClass('animated bounceOutLeft');
}
</script>