Script for a button to check that required fields are completed (including radio buttons)

I want to Show some message is ther is no empty fields. I tried adding 

else app.alert("No errors found.",3); but shows no errors found even there is empty field.

can you help please

var requiredFields = new Array(24);
requiredFields[0] = "Aadhaar Number";
requiredFields[1] = "AplVal";
requiredFields[2] = "Applicant Name Eng";
requiredFields[3] = "Applicant Name Tam";
requiredFields[4] = "GenVal";
requiredFields[5] = "MarVal";
requiredFields[6] = "Date of Birth_af_date";
requiredFields[7] = "RelVal";
requiredFields[8] = "Father Name Eng";
requiredFields[9] = "Father Name Tam";
requiredFields[10] = "Mother Name Eng";
requiredFields[11] = "Mother Name Tam";
requiredFields[12] = "RgnVal";
requiredFields[13] = "ComVal";
requiredFields[14] = "OcuVal";
requiredFields[15] = "DisVal";
requiredFields[16] = "TalVal";
requiredFields[17] = "Street Name Eng";
requiredFields[18] = "Street Name Tam";
requiredFields[19] = "Door Number";
requiredFields[20] = "Pin Code";
requiredFields[21] = "PinVal";
requiredFields[22] = "Mobile Number";
requiredFields[23] = "MobVal";

// These are the alert messages shown when a required field is empty.// Populate array with messages.// Make sure there's one message for each required field.

var alertMsg = new Array(24);
alertMsg[0] = "Please enter Aadhaar Number.";
alertMsg[1] = "Please Select Appelation.";
alertMsg[2] = "Please enter Applicant Name in English.";
alertMsg[3] = "Please enter Applicant Name in Tamil.";
alertMsg[4] = "Please Select Gender.";
alertMsg[5] = "Please Select Marital status.";
alertMsg[6] = "Please enter Date of birth.";
alertMsg[7] = "Please Select Relationship.";
alertMsg[8] = "Please enter Father name in English.";
alertMsg[9] = "Please enter Father name in Tamil.";
alertMsg[10] = "Please enter Mother name in English.";
alertMsg[11] = "Please enter Mother name in Tamil.";
alertMsg[12] = "Please Select Religion.";
alertMsg[13] = "Please Select Community.";
alertMsg[14] = "Please Select Occupation.";
alertMsg[15] = "Please Select District.";
alertMsg[16] = "Please Select Taluka.";
alertMsg[17] = "Please enter Street name in English.";
alertMsg[18] = "Please enter Street name in Tamil.";
alertMsg[19] = "Please enter Door Number.";
alertMsg[20] = "Please enter Pincode.";
alertMsg[21] = "Pincode must be 6 digit.";
alertMsg[22] = "Please enter Mobile Number.";
alertMsg[23] = "Mobile Number must be 10 digit.";

var emptyTest = /^\s*$/;
var fieldCount = requiredFields.length
var fld = 0;
for (var i=0; i < fieldCount; i++)
{fld = this.getField(requiredFields[i]);
if( emptyTest.test(fld.value) )
{
app.alert(alertMsg[i]);fld.setFocus();break;
}

else app.alert("No errors found.",3);
}