大家帮帮忙:document.write(arr[0]+"<br>" + arr[7] +"<br>" + arr[2] + "<br>" +arr[4]);是什么意思?看不懂啊
var arr = ['*',"##","**","&&","****","##*"];
arr[7] = "***";
//显示数组长度
alert(arr.length);
//将数组内容输出,完成达到的效果。
document.write(arr[0]+"<br>" + arr[7] +"<br>" + arr[2] + "<br>" +arr[4]);