Registration Form

Hi, I am using registration form with a number of different steps. And if, for instance, the user wants to come back to correct something, I am using the back img button with the link: javascript:history.back(1) I am wondering how many people are actually using the way I do, and if it's reliable at all or not, I mean whether there are browsers wouldn't support returning back and keep the information in the fields. Advice would be greatly appreciated, Thanks, Vlad p.s. probably the best way is to use sessions(?), but I am carrying values through the steps via <input type=hidden name=name value=value>