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关于document.body.innerHTML
<meta charset="UTF-8">tit <style type="text/css"> div{width: 30px;height: 30px;font-size: 12px;color: #fff;background: red;line-height: 30px;text-align: center;position: absolute;} </style> <script type="text/javascript"> window.onload=function(){ var oDiv=document.getElementsByTagName('div'); var oBtn=document.getElementsByTagName('input'); var m=0; oBtn[0].onclick=function(){ for(i=0;i<9;i++){ document.body.innerHTML+=''+i+''; } } } </script><body>