You must create a web page and code the necessary JavaScript to convert a temperature given in Fahrenheit into Celsius. All specifications must be met and a working web application must be submitted to get full credit.
Criteria
Create a textbox for a user to enter a temperature in Fahrenheit
Add a button that once clicked, will take the given Fahrenheit and convert the value into Celsius.
Display the calculated Celsius temperature in an alert() or somewhere on the web page
Above and beyond (this is optional for an extra challenge)
Add validation to ensure that Fahrenheit is a valid number.
Style the web page with CSS.
Add functionality to convert Celsius to Fahrenheit.