JS 統計字符串

function getLength(val) {
    var str = new String(val); var bytesCount = 0;
    for (var i = 0 ,n = str.length; i < n; i++) {
        var c = str.charCodeAt(i);
        if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f))
        {
            bytesCount += 1;
        }else{
            bytesCount += 1;
        }
    }
    return bytesCount;
}