Hi here is the JS function.

Thanks,

function detIssued_TextChanged(detIssued, evntArgs) {
                    var SigDCDate = $find('<%=detSignatureDC.ClientID%>')._getTxt();
                    var SigDCText = $find('<%=ddlSignatureDC.ClientID%>').get_text();
                    var objStatus = document.getElementById('<%=detStatus.ClientID%>');
                    var selectIndex = document.getElementById('<%=detStatus.ClientID%>').selectedIndex;
                    var selectItem = document.getElementById('<%=detStatus.ClientID%>').options[selectIndex].value;
                    var IssuedDate = $find('<%=detIssued.ClientID%>');
                    var ExpiredDate = $find('<%=detExpires.ClientID%>');
                    var AcceptLetterDate = $find('<%=detAcceptLetterDate.ClientID%>');
                    var isExpReadOnly = ExpiredDate.get_readOnly();
                    var isAcpLetterReadOnly = AcceptLetterDate.get_readOnly();
                    var date = new Date(IssuedDate.get_value());
                    var expDate = new Date();

                    if (IssuedDate._old == null) {
                        if (SigDCDate == "" || SigDCText == "") {
                            alert("Please check and fill all of signatures and dates on the Permit Processing Issuance tab.");
                            IssuedDate.set_text("");
                        }
                        else {
                            AcceptLetterDate.set_readOnly(false);
                            AcceptLetterDate.set_value(date);

                            if (date.getMonth() + 1 == 2 && date.getDate() == 29) {
                                expDate.setFullYear(date.getFullYear() + 1, 2, 1);
                            }
                            else {
                                expDate.setFullYear(date.getFullYear() + 1, date.getMonth(), date.getDate());
                            }
                            ExpiredDate.set_readOnly(false);
                            ExpiredDate.set_value(expDate);
                            ExpiredDate.set_text(expDate);

                            if (isAcpLetterReadOnly) {
                                AcceptLetterDate.set_readOnly(true);
                            }
                            if (isExpReadOnly) {
                                ExpiredDate.set_readOnly(true);
                            }
                        }
                    }
                }

Hi jshiu,

Maybe you are placing the JS functions inside a $(document).ready() jquery function. If you are doing this, take them out in separate <script> tags like Alexander suggested.

Regards