How to write the code for the back button?
If you want to do it (what I think you are trying right now) then replace this line
<input type="submit" <a href="#" onclick="history.back();">"Back"</a>with this
<button type="button" onclick="history.back();">Back</button>If you don't want to rely on JavaScript then you could get the HTTP_REFERER variable an then provide it in a link like this:
<a href="<?php echo $_SERVER['HTTP_REFERER'] ?>">Back</a>
<a href="javascript:history.back(1)">Back</a>this one (by Eiko) is perfect, use css to make a button of <a>...eg you can use this css class in <a> as `
<a class=".back_button" href="javascript:history.back(1)">Back</a>`.back_button {display:block;width:100px;height:30px;text-align:center;background-color:yellow;border:1px solid #000000;}