The onblur event occurs when an object loses focus.
Onblur is most often used with form validation code (e.g. when the user leaves a form field).
Tip: The onblur event is the opposite of the onfocus event.
The onblur event is supported in all major browsers.
The onblur attribute can be used within ALL HTML elements, EXCEPT: <base>, <bdo>, <br>,
<head>, <html>, <iframe>, <meta>, <param>, <script>, <style>,
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