Tabindex and keyboard focus

• tabindex attribute is part of the HTML 4 specification
• Internet Explorer 4.0+ and Firefox 1.5+ support tabindex on any element and adds to keyboard tab navigation
• Values:
  • -1: Allow keyboard focus, but do not add to tab order
  • 0: Allow keyboard focus and add to tab order
  • >0: Allow keyboard focus and add to tab order
• The use of tabindex is not part of HTML 4.01 standard and direct use results in invalid documents