代码如下：
<!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 myarr=new Array(4)
//显示数组长度
//alert("数组长度:"+myarr.length)
//将数组内容输出，完成达到的效果。
for(var i=0;i<4;i++)
{for(var j=0;j<=i;j++)
myarr[i]=myarr[i]+"*";
document.write(myarr[i]+"<br>")
}
</script>
</head>
<body>
</body>
</html>
得到的结果是
undefined*
undefined**
undefined***
undefined****
2015-10-14
<!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.push("**");
arr.splice(1,1);
arr.splice(2,1);
arr.splice(3,1);
// alert(arr)
for(var i=0;i<arr.length;i++)
{
for(var j=i;j<arr.length;j++)
{
if( arr[i].length>arr[j].length)
{
var s=arr[i];
arr[i]=arr[j];
arr[j]=s;
}
}
document.write(arr[i]+"</br>")
}
</script>
</head>
<body>
</body>
</html>
举报
