title: Advanced Javascript form validation function
body: <p><a href="http://www.javascript-coder.com/html-form/javascript-form-validation.phtml#using" rel="nofollow">This</a> is what I'm using.</p>
  
  <p>It's great. I only need to add function that checks if one of "cp", "bp", "hp" input area is entered or not. If not it should give an error that says "Please enter at least 1 phone number." </p>
  
  <p><em>(cp = cell phone, bp = business phone, hp = home phone)</em></p>