数组

合并数组

var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"


var arr2 = new Array(3)
arr2[0] = "James"
arr2[1] = "Adrew"
arr2[2] = "Martin"


document.write(arr.concat(arr2))

用数组的元素组成字符串 - join()

var arr = new Array(3);
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"

document.write(arr.join());
document.write("<br />");
document.write(arr.join("."));

结果：George,John,Thomas
    George.John.Thomas

排序方法 sort()