Umm... I want to change the border size around my submit button. How would I do that?

<input class=button type="submit" style="font-family:courier new" style="border style:solid" style="background:#FFFFFF" style="color:#000000" value="Submit" onclick="return Clear_Last_Message_on_Submit();">

style="border-width: #px;"

Also:
style="border style:solid"

There should be a hyphen between border and style.

Thank you :)