哪里有问题,没有输出
<!DOCTYPE HTML> <html > <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>数组</title> <script type="text/javascript"> //创建数组 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/>"); document.write(arr[7]+"<br/>"); document.write(arr[2]+"<br/>"); document.write(arr[4]+"<br/>"); </script> </head> <body> </body> </html>