Regex (or other) to detect presence of 1-byte Kanji or Katakana chars 1

[BillyRayPreachersSon]

I'm creating a sign-up form for the Japanese version of a site, and there are two 'name' fields, one for Kanji, and one for Katakana. Both are mandatory. The only restriction is that both must only contain 2-byte characters.

My knowledge of Japanese is next-to-nothing, and after staring at pages on Wikipedia all day, my head hurts , although I've managed to find out that there are single-byte Japanese characters (previously, I'd assumed all Japanese characters would be 2-byte).

Does anyone know if it's possible to detect the presence of 1-byte Japanese characters in a standard text-input field using a regular expression (to make it easier to plug into our validation routine), and if not, any method that I might use?

Many thanks in advance,

Dan



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[BillyRayPreachersSon]

Hmm... I think I have it with this:

/^[^\uFF60-\uFF9F]+$/

although if anyone who knows more about Japanese character entry that me can confirm this, I'd really appreciate it.

Dan



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[tsuji]

There are two kinds:
[1] half-width katakana; and
[2] katakana phonetic expression

The regex to detect them is:
[tt]
var rx=/[\uff66-\uff9d]|[\u31f0-\u31ff]/;
//s the string read to the memory to be tested.
if (rx.test(s)) {
alert("contains invalidate katakana characters);
} else {
alert("pass the filtering of half-width katakana or katakana phonetic expression");
//do further testing
}
[/tt]

 

[BillyRayPreachersSon]

Great - thanks very much for that!

Dan



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