var str = "abdcadfasfdbadfafdasdfasyweroweurowqrewqrwqrebwqrewqrejwq;;";

        // console.log(numInstring(str));

        function numInstring(str) {

            var text = "";

            //循环的套出每个字符出现的次数 str会慢慢的变短直到为空

            while (str != "") {

                //先将字符打散

                var newstr = str.split("");

                var count = ;

                //求得第一个字符出现的次数

                for (var i = ; i < newstr.length; i++) {

                    if (newstr[] == newstr[i]) {

                        count++;

                    }

                }

                //在字符串中删掉跟第一个字符一样的所有字符

                var re = new RegExp(newstr[], "g");

                str = str.replace(re, "");

                text += newstr[] + ":" + count + "次;";

            }

            return text; //我这里返回的是一段文本 可以自己改写成自己想要的形式

        }

        var str = "adadseffouyangpingfsffffftsdg";

        (function(str) {

            var t = str,

                result = {};

            while (t) { // if this l exists

                var _st = t.substr(, );

                var m = t.replace(new RegExp(_st, 'gi'), '');

                result[_st] = t.length - m.length;

                t = m;

            }

            var name;

            for (name in result) {

                document.write(name + ":" + result[name] + "  ");

            }

            return result;

        })(str);

        var str1 = "caibaojian.com";

        var arr = str1.split("");

        var obj = {};

        var objArr = [];

        for (var i = , j; j = arr[i]; i++) {

            if (!obj[j]) {

                obj[j] = ;

            }

            objArr[++obj[j]] = j;

        }

        console.info(objArr[objArr.length - ], objArr.length - );