Debug

Hi,

I am working on a function that has to be called within an html page.

The function takes data from different tables and return a float.

I am in troubles with this function and would like to know what debug tools may I use.

Is there a way to populate a "debug table " with deluge video within the table?

Allert or Info work within a function?

Can a function return an array and not a single value?

Tks

Pippo