Php and ajax problem with getting back to original data in same placeholder

[Darla]

Hello

 

I am kind of a newbie at ajax. I have a little table displaying some variables, and listbox which triggers the ajax ->javascript->php page. The table displaying the variables is the placeholder (inside a div tag), the table values change upon selecting values here.  The change when selecting from the listbox is displaying an average of the values based on date, when the user enter the page the initial values are displayed.

 

My problem is when the user select from the listbox the table values change accordingly. But how do I get back to the original content/home of the page? I wish to use the same graphical element/same div tag.

 

I tried creating a jsscript for going the other way, It worked except that the listbox no longer triggers the ajax..

 

Darla