平假名、片假名转换

function katakanaToHiragana(src) {
    return src.replace(/[\u30a1-\u30f6]/g, function(match) {
        var chr = match.charCodeAt(0) - 0x60;
        return String.fromCharCode(chr);
    });
}

function hiraganaToKatagana(src) {
    return src.replace(/[\u3041-\u3096]/g, function(match) {
        var chr = match.charCodeAt(0)   0x60;
        return String.fromCharCode(chr);
    });
}