var Data = "TESTID004,1234,567,89,0,ABCDEFG,HIJK,LMN"; var arr = Data.split(","); // 1. array count console.log("COUNT : " + arr.length ); // 2. arr[0] length console.log("LENGTH : " + arr[0].length ); // 3. parse ID , TESTIDXXX arr[0] = arr[0].substr(arr[0].length - 3, 3); // 004 for(var a = 0; a < arr.length; a++) { console.log( a + " : " +arr[a]); } - 결과 COUNT : 8 LENGTH : 9 0 : 004 1 : 1234 ..