This is a main function that calls a series of subfunctions, each of which checks a single form element for compliance. If the element complies than sufunction returns an empty string. Otherwise it returns a message describing the error and highlight appropriate element with yellow.
function validateFormOnSubmit(theForm) {
var reason = "";
reason += validateUsername(theForm.username);
reason += validatePassword(theForm.pwd);
reason += validateEmail(theForm.email);
reason += validatePhone(theForm.phone);
reason += validateEmpty(theForm.from);
if (reason != "") {
alert("Some fields need correction:\n" + reason);
return false;
}
return true;
}
