It doesn't work like that. PHP is only server-side, and JavaScript is only client-side. As I said, the variables are going to have whatever value you assign them in the script. You can't assign them a value of '0', and then expect them to retain that value on later executions, because they won't. The only way you can do that is by storing the value somewhere, and recalling it later. If someone executes your script to add the values '2' and '3' together, the script isn't going to 'remember' that it used '2' on the next run, so the variable isn't going to have a default value of '2' or anything. I think that's what you're getting at, anyway.

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I know what you are getting at. For my problem, I want the result to be reflected back at the original value. So after clicking the default reset button, I want the result to be shown as 0 or something like that. As you said Javascript handles button clicks on the client side, so I want javascript to reset the value but this variable is a php variable, how can I port it into javascript so that I can reset it?

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