JS去除重复的字符串内容

 

 function checkRe(checkid) {

            var id = window.parent.getQry("ctrid") + "_";

            var values = window.parent.opener.document.getElementById(id + "txt_dept_name").value;
            var keys = window.parent.opener.document.getElementById(id + "hf_ids").value;

            var ary = checkid.value.split("|");
            var newsValues = ary[0];
            var newsKeys = ary[1];

            if (checkid.checked) {
                values = values + "," + newsValues;
                keys = keys + "," + newsKeys;

            }
            else {
                values = values.replace(new RegExp("," + newsValues), "");
                keys = values.replace(new RegExp("," + newsKeys), "");

            }

            values = okd(values);
            keys = okd(keys);

            window.parent.opener.document.getElementById(id + "txt_dept_name").value = values;
            window.parent.opener.document.getElementById(id + "hf_ids").value = keys;

            return;

        }
        //转换成数组，去掉重复，再组合好。
        function okd(str) {

            var ary = str.split(",");
            // 去重的算法
            var json = {};
            for (var i = 0; i < ary.length; i++) {

                if (ary[i] != "") {

                    json["a" + ary[i]] = ary[i];
                }
            }

            // 查看结果
            var str2 = "";
            for (var key in json) {
                str2 += "," + json[key];
            }

            var s = str2.toString();

//去掉第一个逗号
            if (s.substr(0, 1) == ',') {
                s = s.substr(1);
            }

            return s;
        }

        function add_all() {
            var ck = document.getElementsByTagName("input");
            for (i = 0; i < ck.length; i++) {
                if (ck[i].type == "checkbox") {
                    ck[i].checked = true;
                    checkRe(ck[i]);

                }
            }

        }

        function del_all() {
            var id = window.parent.getQry("ctrid") + "_";
            window.parent.opener.document.getElementById(id + "txt_dept_name").value = "";
            window.parent.opener.document.getElementById(id + "hf_ids").value = "";

            var ck = document.getElementsByTagName("input");
            for (i = 0; i < ck.length; i++) {
                if (ck[i].type == "checkbox") {
                    ck[i].checked = false;

                }
            }
        }

 

 <input id='chk_pkId' type='checkbox' name='chk' onclick='checkRe(this);' value='值|pkId' />