js Unicode编码相互转换

<script>
/*
*js Unicode编码转换
*/
var decToHex = function (str) {
var res = [];
for (var i = 0; i < str.length; i++)
res[i] = ("00" + str.charCodeAt(i).toString(16)).slice(-4);
return "\\u" + res.join("\\u");
}
var hexToDec = function (str) {
str = str.replace(/\\/g, "%");
return unescape(str);
}
var str = decToHex("PHP二次开发：www.php2.cc");
alert("编码后：" + str + "\n\n解码后：" + hexToDec(str));
</script>