Javascript/ Ajax Error. I can't figure it out.

[leathalassassin]

I have a JavaScript in an external page and the script reference in the master page of asp.net. I am getting an error I can not figure out.

"Now it is saying that JavaScript runtime error: Unable to set property 'onclick' of undefined or null reference."

Any tips on how to fix this would be greatly appreciated.

$(document).ready(function () {
 
    var myButton = document.getElementById('<%= btnsubmit.ClientID %>');
 
    myButton.onclick = function () {
 
        var script = document.createElement("script");
        $.ajax({
            url: "testmenow.aspx",
            data: null,
            success: function (data) {
                $("#parttable").html(data);
            }
        });
        return false;
    }
 
 
});
 
 
ASP page
<div id="parttable"> </div> <asp:Button ID="btnsubmit" runat="server" Text="click me" name="btnsubmit" />

[Dormilich]

that simply means that JS failed to locate your myButton element.