for-计算元素和坐标

运用for循环计算元素和坐标，做出这样一个小玩意出来

 1 <!DOCTYPE HTML>
 2 <html>
 3 <head>
 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 5 <title>无标题文档</title>
 6 
 7 <style>
 8 div { 50px; height:50px; background:red; position:absolute; top:0; left:0; font-size:30px; text-align:center; line-height:50px; color:#fff; }
 9 </style>
10 
11 <script>
12 window.onload = function (){
13     var aDiv = document.getElementsByTagName('div');
14     
15     for( var i=0; i<11; i++ ){
16         document.body.innerHTML += '<div>' + i + '</div>';
17     }
18     
19     for( var i=0; i<aDiv.length; i++ ){
20         aDiv[i].style.left = 10 + i*50 + 'px';
21         aDiv[i].style.top = 10 + i*50 + 'px';
22     }
23     
24 };
25 </script>
26 </head>
27 
28 <body>
29 
30 
31 
32 </body>
33 </html>

示例代码