i have an applcation which displays an image in selecting an item from a drop down list. now, I am selecting the item for n-number of times and viewing the coresponding image after cliking on submit. Now at one point i click "back " button on the browser and i see that it doers not display my previous selction in drop dwon.it displayus the curent selection only. my browser back button is not disabled. i see that the image is not geting refreshed. please assist.