change php variable using ajax

[bezierstek]

Hi all,

I need to change the value of a variable in the main php script I have based on the choice that is made in a list menu and then also update the figure displayed on screen.

What I have at the moment passes the variable to a secondary php script which does some maths depending on the choice made, but doesn't pass this back into the main script.

Am I trying to make things hard for myself by using Ajax when I should be thinking of a different way to approach this.

 

[bezierstek]

Actually thinking about it I think I just need to get the value of both the menu and the radio group button when either of them have been changed. Can this be done? (I know this is purely javascript not ajax but as my post is here I thought I may as well leave it rather than start a new thread)