How to detect if a specified amount is NaN and how to : <p>Okay, so I on my site people play with coins now the feature where you go to use the coins can be "Cheated" by using console in javascript using a string that is NaN so I wan't to know how I can filter if the string inputted in the bets are NaN and if they are not a number I wan't to pop up an error message and if they are numbers I want it to continue with the rest of the script.</p>
