How can I prevent Backspace from navigating back in javascript?

Question

This works in IE, but I cannot get it to work in Opera or Firefox. I want to prevent Backspace from navigating away if and only if the current focus is the SELECT dropdown.

Answer 1

Using jquery - for only select dropdown

$(document).ready(function(){ 
     //for IE use keydown, for Mozilla keypress  
     //as described in scr: http://www.codeproject.com/KB/scripting/PreventDropdownBackSpace.aspx
     $('select').keypress(function(event){if (event.keyCode == 8) {return false;}});
     $('select').keydown(function(event){if (event.keyCode == 8) {return false;}});
}

For all elements in page except input controls and textarea is as follows