将字符串用“|”分割。

function myjoin(arr) {
            if (arr.length <= 0) {
                return "";
            }
            var s = arr[0];
            for (var i = 1; i < arr.length; i++) {
                s = s + "|" + arr[i];
            }
            return s;
        }
        var arr = new Array();
        arr[0] = "tom";
        arr[1] = "jerry";
        arr[2] = "lily";
        alert(myjoin(arr));