function checkFields() {
missinginfo = "";

if (document.form1.txtLastName.value == "") {
missinginfo += "\n     -  Last Name";
}
if (document.form1.txtFirstName.value == "") {
missinginfo += "\n     -  First Name";
}


if (document.form1.txtComments.value == "") {
missinginfo += "\n     -  Comments";
}

if (missinginfo != "") {
missinginfo ="_____________________________\n" +
"You failed to correctly fill in your:\n" +
missinginfo + "\n_____________________________" +
"\nPlease re-enter and submit again!";
alert(missinginfo);
return false;
}
else return true;
}