Write HTML page that asks the user to enter the city current temperature and changes the background color depending on that temperature:
• Use HTML form to display textbox as temperature field and a button to change the background color (Use HTML form, do not use JavaScript prompt messages to get user input).
• Change background color according to:
?if temperature<20 change background color to "Blue".
?If 20< temperature <40 change background color to "Yellow".
?if temperature>40 change background color to "Red".
• Validate the temperature textbox and make sure it is not empty, Otherwise display an alert message.