function BothFieldsIdenticalCaseSensitive() {
var one = document.newsletter.EMAIL.value;
var another = document.newsletter.email.value;
if(one == another) { return true; }
alert("The email addresses are not identical. Please check your spelling.");
return false;
}

function BothFieldsIdenticalCaseInsensitive() {
var one = document.newsletter.EMAIL.value.toLowerCase();
var another = document.newsletter.email.value.toLowerCase();
if(one == another) { return true; }
alert("The email addresses are not identical. Please check your spelling.");
return false;
}