<input
type
=
"text"
onkeydown
=
"f(this)"
onkeyup
=
"f(this)"
onblur
=
"f(this)"
onclick
=
"f(this)"
/
>
function
f
(
o
)
{
o.
value
=o.
value
.
toUpperCase
(
)
.
replace
(
/
(
[
^
0
-9A-Z
]
)
/g
,
""
)
;
}