Validating all type of controls in a form using javascript Forms Validation

Form Validation in Javascript

 

//**************Blank check validation*********************

        function check_blank(fldid, msgid) {
            var fld = document.getElementById(fldid);
            if (fld.value.length == 0 || fld.value.charAt(0) == "
") {
 
                document.getElementById(msgid).innerHTML = "The required field has not been filled in";
                //document.getElementById(error_icon_star).innerHTML = '<img src="WebResource.gif" height="15px" style="width:15px;"/>';
                return false;
            }
            document.getElementById(msgid).innerHTML = "&nbsp;";
            //document.getElementById(error_icon_star).innerHTML = '<b style="color:Red">*</b>';
            return true;
        }


        //**************Email formate validation*********************

        function validate_email(fieldid, msgid, error_icon_star) {
            var field = document.getElementById(fieldid);
            with (field) {
                if (check_blank(fieldid, msgid)) {
                    apos = value.indexOf("@");
                    dotpos = value.lastIndexOf(".");
                    if (apos < 1 || dotpos - apos < 2) {
                        document.getElementById(msgid).innerHTML = 'please enter correct email';
                        //document.getElementById(error_icon_star).innerHTML='<img src="WebResource.gif" height="15px" style="width:15px;"/>';

                        return false;
                    }
                    else {
                        document.getElementById(msgid).innerHTML = "&nbsp;";
                        //document.getElementById(error_icon_star).innerHTML='<b style="color:Red">*</b>';
                        return true;
                    }
                }
                return false;
            }
        }




        //**************MobileNo 10 digit validation*********************

        function ValidateMobileNumber(fldid, ErrorMsgid) {
            var fld = document.getElementById(fldid);
            var error = "";
            var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');

            if (fld.value == "") {
                error = "You didn't enter a phone number.\n";
            } else if (isNaN(stripped)) {
                error = "The phone number contains illegal characters.\n";
            } else if (!(stripped.length == 10)) {
                error = "The phone number is the wrong length. Make sure you included an area code.\n";

            }

            if (error.length > 0) {
                document.getElementById(ErrorMsgid).innerHTML = error;
                //document.getElementById(error_icon_star).innerHTML='<img src="WebResource.gif" height="15px" style="width:15px;"/>';
                return false;
            }
            document.getElementById(ErrorMsgid).innerHTML = "&nbsp;";
            //document.getElementById(error_icon_star).innerHTML='<b style="color:Red">*</b>';
            return true;
        }





        //**************ConfirmPassword validation*********************

        function confirm_password(pwd_fieldid, conpwd_fieldid, msgid) {
            var pwd = document.getElementById(pwd_fieldid).value;
            var conpwd = document.getElementById(conpwd_fieldid).value;
            if (pwd != conpwd) {
                document.getElementById(msgid).innerHTML = 'Your passwords do not match. Please type more carefully.';
                //document.getElementById(error_icon_star).innerHTML = '<img src="WebResource.gif" height="15px" style="width:15px;"/>';
                return false;
            }
            document.getElementById(msgid).innerHTML = "&nbsp;";
            // document.getElementById(error_icon_star).innerHTML = '<b style="color:Red">*</b>';
            return true;
        }





        //**************Radiobuttonlist validation*********************

        function validateRadioButtonList(radiobuttonlist_id, msgid) {
            var listItemArray = document.getElementById(radiobuttonlist_id);
            var isItemChecked = false;

            for (var i = 0; i < listItemArray.rows.length; i++) {
                var listItem = document.getElementById(radiobuttonlist_id + "_" + i);
                if (listItem.checked) {
                    isItemChecked = true;
                }
            }

            if (isItemChecked == false) {
                document.getElementById(msgid).innerHTML = "Please select atleast oneitem";
                //document.getElementById(error_icon_star).innerHTML='<img src="WebResource.gif" height="15px" style="width:15px;"/>';

                return false;
            }
            document.getElementById(msgid).innerHTML = "&nbsp;";
            //document.getElementById(error_icon_star).innerHTML='<b style="color:Red">*</b>';
            return true;
        }





        //**************dropdown validation*********************

        function Dropdown_Validation(fieldid, msgid) {
            var empty = document.getElementById(fieldid).value;
            if (empty == "--Select--") {
                document.getElementById(msgid).innerHTML = "Please Select An Item";
                //document.getElementById(error_icon_star).innerHTML='<img src="WebResource.gif" height="15px" style="width:15px;"/>';
                return false;
            }
            document.getElementById(msgid).innerHTML = "&nbsp;";
            //document.getElementById(error_icon_star).innerHTML='<b style="color:Red">*</b>';
            return true;
        }

       //******************Save button validation to all page***********

        function form_submit() {
            var fname = check_blank("<%=fname.ClientID %>", "fnamemsg");
            var lname = check_blank("<%=lname.ClientID %>", "lnamemsg");
            var username = check_blank("<%=username.ClientID %>", "usernamemsg");
            var password = check_blank("<%=password.ClientID %>", "passwordmsg");

            var confirm = confirm_password("<%=password.ClientID %>", "<%=passwordmatch.ClientID %>", "passwordmatchmsg");
            var type = validateRadioButtonList("<%=Rblist.ClientID %>", "typemsg");
            var email = validate_email("<%=email.ClientID %>", "emailmsg");
            var phone = ValidateMobileNumber("<%=phone.ClientID %>", "phonemsg");
            var country = Dropdown_Validation("<%=country.ClientID %>", "countrymsg");

            var state = check_blank("<%=state.ClientID %>", "statemsg");
            var city = check_blank("<%=city.ClientID %>", "citymsg");
            var address = check_blank("<%=address.ClientID %>", "addressmsg");

            if (fname && lname && username && password && confirm && type && email && phone && state && city && address) {
                return true;
            }
            return false;
        }

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