disable submit button until form is fully validated code example

Example 1: disabling submit button until all fields have values

$(function () {
    $('#submits').attr('disabled', true);
    $('#initial_5').change(function () {
        if ($('#initial_1').val() != '' && $('#initial_2').val() != '' && $('#initial_3').val() != '' && $('#initial_4').val() != '' && $('#initial_5').val() != '') {
            $('#submits').attr('disabled', false);
        } else {
            $('#submits').attr('disabled', true);
        }
    });
 });

Example 2: javaScript disable submit button until form is fully validated

function fieldValidation() {

var name = document.forms['RegForm']['Name'].value;
var address = document.forms['RegForm']['Address'].value;
var email = document.forms['RegForm']['EMail'].value;
var password = document.forms['RegForm']['Password'].value;
var telephone = document.forms['RegForm']['Telephone'].value;
var job = document.forms['RegForm']['Job'].value;
var comment = document.forms['RegForm']['Comment'].value;
var fullName = /^[a-zA-Z]+ [a-zA-Z]+$/;
var phnFormat = /((\(\d{3}\) ?)|(\d{3}-))?\d{3}-\d{4}/;

if (name === '') {
  alert('Please enter your name.'); 
  return false;
}

if (!fullName.test(name)) {
  alert('Please make sure we have your full name.');
  return false;
}

if (address === '') { 
  alert('Please enter your address.'); 
  return false; 
} 

if (email === '') { 
  alert('Please enter your e-mail address.'); 
  return false; 
} 

if (password === '') { 
  alert('Please enter a password.'); 
  return false; 
}   

if (telephone === '') { 
  alert('Please enter your telephone number.'); 
  return false; 
}

if (!phnFormat.test(telephone)) {
  alert('Please enter your phone number in the following format: (123) 555-1212)');
  return false;
}

if (job.value === '') { 
  alert('Please select a job choice.'); 
  return false; 
} 

if (comment.value === '') { 
  alert('Please enter a comment.'); 
  return false; 
}
  return true;
}