function CheckSender(strFirstNameFields,strLastNameFields,strEmailFields,blnSameSender) {
    if (blnSameSender) {
        arrFirstNameFields = strFirstNameFields.split("=");
        arrLastNameFields = strLastNameFields.split("=");
        arrEmailFields = strEmailFields.split("=");
        
        document.getElementById(arrFirstNameFields[1]).value = document.getElementById(arrFirstNameFields[0]).value;
        document.getElementById(arrLastNameFields[1]).value = document.getElementById(arrLastNameFields[0]).value;
        document.getElementById(arrEmailFields[1]).value = document.getElementById(arrEmailFields[0]).value;
    }
}