应验非连续不重复的数字

// 验证非连续不重复的数字
function validateContinuousNum(str) {
??? for ( var k = 1; k < str.length; k++) {
??? ??? if (str.charCodeAt(k - 1) + 1 != str.charCodeAt(k)) {
??? ??? ??? break;
??? ??? }
??? }
??? if (k == str.length) {
??? ??? return false;
??? }
??? ;
??? for ( var i = 1; i < str.length; i++) {
??? ??? if (str.charCodeAt(i - 1) - 1 != str.charCodeAt(i)) {
??? ??? ??? break;
??? ??? }
??? }
??? if (i == str.length) {
??? ??? return false;
??? }
??? ;
??? for ( var j = 0; j < str.length; j++) {
??? ??? if (str.charAt(0) != str.charAt(j))
??? ??? ??? break;
??? }
??? if (j == str.length)
??? ??? return false;
}