function checkFields() {
missinginfo = "";
if (document.form.FIRST_NAME.value == "") {
missinginfo += "\n     -  FIRST_NAME";
}
if (document.form.SURNAME.value == "") {
missinginfo += "\n     -  SURNAME";
}
if (document.form.PHONE_NUMBER.value == "") {
missinginfo += "\n     -  PHONE_NUMBER";
}
if ((document.form.EMAIL.value == "") || 
(document.form.EMAIL.value.indexOf('@') == -1) || 
(document.form.EMAIL.value.indexOf('.') == -1)) {
missinginfo += "\n     -  EMAIL";
}
if (document.form.ADDRESS_FIRST_LINE.value == "") {
missinginfo += "\n     -  ADDRESS_FIRST_LINE";
}
if (document.form.TOWN.value == "") {
missinginfo += "\n     -  TOWN";
}
if (document.form.COUNTY.value == "") {
missinginfo += "\n     -  COUNTY";
}
if (document.form.POSTCODE.value == "") {
missinginfo += "\n     -  POSTCODE";
}
if (document.form.CHILDS_AGE.value == "") {
missinginfo += "\n     -  CHILDS_AGE";
}

if (missinginfo != "") {
missinginfo ="_____________________________\n" +
"\nPlease fill in the following fields:\n" +
missinginfo + "\n_____________________________" +
"\n\nThen click on Request Details again.\n";
alert(missinginfo);
return false;
}
else return true;
}