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<!DOCTYPE html> <html> <head> <style> input:focus { background-color: yellow; } </style> </head> <body> <form action="form_action.asp" method="get"> First name: <input type="text" name="fname"><br> Last name: <input type="text" name="lname"><br> <input type="submit" value="Submit"> </form> <p><b>Note:</b> IE8 supports the :focus pseudo-class only if a !DOCTYPE is specified.</p> </body> </html>