var mergeTo = [4,5,6],    mergeFrom = [7,8,9];  mergeTo = mergeTo.concat(mergeFrom); mergeTo; // is: [4, 5, 6, 7, 8, 9] 

var a = [1,2], b = [3,4], c = a.concat(b);  

var mergeTo = [4,5,6], var mergeFrom = [7,8,9];  Array.prototype.push.apply(mergeTo, mergeFrom);  mergeTo; // is: [4, 5, 6, 7, 8, 9] 

// 特殊處理業務-必須啟用 var _SPECIAL_MUST_ENABLE_LIST = ['intime'];  if(termNo != null && termNo.indexOf("9966") == 0){   var newMustEnableList = ['mobile','psp','jtk','credit','train','bank','alipay','lottery','movie','littleTransfer',                'trafficFines','concert','mall','airplane','hotel','recycle'];   _SPECIAL_MUST_ENABLE_LIST = _SPECIAL_MUST_ENABLE_LIST.concat(newMustEnableList); }