I am using a ASP.net form with custom onclick mouse events to modify data values. Upon clicking and updating the values, one div section of the form performs a postback.

onclick="__doPostBack('ctl01$phCon1$gridReports','sel1')"

This is working well, however when the browser BACK option is selected, the browser opens goes through the history of the DIV ajax/onclick actions prior to going back to the prior URL.

I suspect that this may be due to the doPostBack being treated as a browsing operation. Is there a means to perform the necessary ASP.net code events to make the page work, but not have the action stored in the browser history?