Calling a 'WebMethod' with jQuery in ASP.NET WebForms

I've set a breakpoint in the following WebMethod but I'm never hitting the breakpoint.

cs:

[WebMethod]
public static string search()
{
    return "worked";
}

aspx:

  function search() {
    $.ajax({
        type: "POST",
        url: "ProcessAudit/req_brws.aspx/search",
        data: "{}",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (msg) {
            alert(msg)
        }
    });
}

<button id = "btnSearch" onclick = "search()" >Search</button>