HTML Attribute for <INPUT ...>
ACCESSKEY ="text string"

ACCESSKEY specifies a shortcut key to go directly to the input field. The key is pressed along with the ALT key. For button style fields, using the key is like pressing the button. So, in the form produced with this code: 

<INPUT TYPE=SUBMIT 
ACCESSKEY="g"
 VALUE="Go!"
 >

You can submit the form by hitting ALT-g:

(Form is not live)

For text entry fields, the key takes the cursor to that field. So with this code: 

color: <INPUT TYPE=INPUT 
 NAME="color"
ACCESSKEY="c"
 >

ALT-c takes you to the input field:

color: (Form is not live)

<INPUT TABINDEX="..."> >