javascript 把汉字转换为unicode编码

[javascript]代码库

W.hasChinese = function(s) {
	return /[\u4E00-\u9FA5]|[\uFE30-\uFFA0]/.test(s);
};
W.isChinese = function(s) {
	return /^[\u4E00-\u9FA5]|^[\uFE30-\uFFA0]/.test(s);
};
W.hasJapanese = function(s) {
	return /[\u0800-\u4e00]/.test(s);
};
W.isJapanese = function(s) {
	return /^[\u0800-\u4e00]/.test(s);
};
W.hasKorean = function(s) {
	return /[\u3130-\u318F]|[\uAC00-\uD7A3]/.test(s);
};
W.isKorean = function(s) {
	return /^[\u3130-\u318F]|^[\uAC00-\uD7A3]/.test(s);
};
W.isDoubleByte = function(letter) {
	return letter && letter.charCodeAt(0) > 255;
};
W.cn2Unicode = function(str) {
	var i,
	length,
	chr,
	unicode = '';
	if (W.isStr(str)) {
		for (i = 0, length = str.length; i < length; i++) {
			chr = str[i];
			unicode = W.hasChinese(chr) ? unicode + '\\u' + chr.charCodeAt(0).toString(16) : unicode + chr;
		}
	}
	return unicode;
};