HTML5 Validation Not Trigering - html

Question

I'm working on making client side validation for inputs.
I had had been using PHP to do it all.
Needless to say things got cluttered very quickly.
So I looked in to JS and HTML5 and want to move in to that system for validation.
The messages I want to show are like this:
I know that these are done with the the <input type="email"> tag.
After some help, I was pointed to this page html5rocks.
However I cant seem to get anything to popup.
I copied code straight from there site and nothing.
<input id="foo" type="number" max="2" value="1" />
<input id="bar" type="number" max="2" value="3" />
<script>
document.getElementById('foo').validity.rangeOverflow; //false
document.getElementById('bar').validity.rangeOverflow; //true
</script>
What am I missing to make the notification appear?

Answer 1

That popup is a new implementation in HTML5. Just create an input field like this:
<input type="email">
The popup appears automatically when the form is submitted if the input isn't an email-address.
More about the new input fields in HTML5 is at W3Schools.

Answer 2

Form must be submitted before validation kicks in.
So you have to add a button with the type of submit so like so:
<input type="submit" value="blah">
And then you have to enclose all the fields/inputs in a <form> and </form> tag.
here is the working code:
<form>
<input id="foo" type="number" max="2" value="1" />
<input id="bar" type="number" max="2" value="3" />
<input type="submit" value="blah">
</form>
<script>
document.getElementById('foo').validity.rangeOverflow; //false
document.getElementById('bar').validity.rangeOverflow; //true
</script>