form validation - dynamic checkbox
I have a form which contains a number of check boxes in format of fielduse_x where x is incremented each time (1 - 30)
Everytime one of the checkboxes is ticked or unticked i want to perform a function for related boxes but i am having difficaulty doing this.
f is passed from the form field and contains the number (1 - 30). I know that the form is passing the values across as alert(f) gives the correct number. I don't seem to be able to get the next line to work. How do i put the value of f into the if statment as what i have done isn't working