javascript concat数组累加 示例

　　<script type="text/javascript">

　　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))

　　</script>