HTML常用编码转换

var encoding = (function () {
   function ToASCII(str) {
       return this.ToNormal(str).replace(/[^\u0000-\u00FF]/g, function () { return escape(arguments[0]).replace(/(?:%u)([0-9a-f]{4})/gi, "\$1;") });
   }
   function ToUnicode(str) {
       return this.ToNormal(str).replace(/[^\u0000-\u00FF]/g, function () { return escape(arguments[0]).replace(/(?:%u)([0-9a-f]{4})/gi, "\\u$1") });
   }
   function ToNormal(str) {
       return str.replace(/(?:)([0-9a-f]{4});|(?:\\u)([0-9a-f]{4})/gi, function () { return unescape("%u" + (arguments[1] || arguments[2])); });
   }
   function ToCss(str) {
       return this.ToNormal(str).replace(/[^\u0000-\u00FF]/g, function () { return escape(arguments[0]).replace(/(?:%u)([0-9a-f]{4})/gi, "\\$1") });
   }
   return {
       ToASCII: ToASCII,
       ToUnicode: ToUnicode,
       ToNormal: ToNormal,
       ToCss: ToCss
   };
})();
console.log(encoding.ToASCII("宋体"));
console.log(encoding.ToUnicode("宋体"));
console.log(encoding.ToNormal("宋\\u4F53"));
console.log(encoding.ToUnicode("宋体"));
console.log(encoding.ToCss('Arial , Helvetica ,"宋体", sans-serif'));
转载自：http://www.w3cplus.com/code/473.html