Fire event in aspx page in asp.net

Fire event in aspx page in asp.net in jquery or Fire event in jquery in aspx page in asp.net or
aspx event in jquery

<html>
<asp:DropDownList ID="ContentPlaceHolder1_ddlGroup" runat="server" class="form-control" AutoPostBack="true"
                                            OnSelectedIndexChanged="ddlGroup_IndexChanded"  required >
                                                    </asp:DropDownList>
</html>

<script>

$("#ContentPlaceHolder1_ddlGroup").trigger("change");

or




$("#ContentPlaceHolder1_ddlGroup").trigger("click");
</script>