function Validate() {

var sMessage = '';

var bFail = false;

var filter=/^.+@.+\..{2,4}$/

var bSelected = false

if (document.layers||document.getElementById||document.all) {

            if (filter.test(document.RegistrationForm.Email.value)) { }

            else {

                        bFail = true;

                        sMessage = sMessage + 'Please Enter A Valid Email Address \n';

                        document.RegistrationForm.Email.focus() } }

if (document.RegistrationForm.FirstName.value == '') {

            bFail = true;

            sMessage = sMessage + 'First Name is blank \n';

            document.RegistrationForm.FirstName.focus()}

if (document.RegistrationForm.LastName.value == '') {

            bFail = true;

            sMessage = sMessage + 'Last Name is blank \n';

            document.RegistrationForm.LastName.focus()}

if (bFail) {

            sHeader =  '_________________________________________________\n\n';

            sHeader += 'The form was not submitted because of the following error(s).\n';

            sHeader += 'Please correct these error(s) and resubmit.\n';

            sHeader += '_________________________________________________\n\n';

            sHeader += '- The following required field(s) are empty :\n';

            window.alert(sHeader + sMessage);

            return false; }

else {

            document.all.btnSubmit.disabled = true;

            return true; } 

}