<script type="text/javascript">  var body = document.getElementsByTagName('body')[0];  var wrap = document.createElement('div');  wrap.id = 'wrap';  body.appendChild(wrap);  var wrap = document.getElementById('wrap');  for (var i = 1; i < 10; i++) {   for (var j = 1; j <= i; j++) {    var p = document.createElement('p');    //設置格子(p標簽)樣式    p.style.width = '100px';    p.style.height = '30px';    p.style.lineHeight = '30px';    p.style.background = 'yellow';    p.style.display = 'inline-block';    p.style.border = '1px solid green';    p.style.textAlign = 'center';    //格子添加內容    p.innerHTML = j + "*" + i + "=" +(j * i);    wrap.appendChild(p);   }   var br = document.createElement('br');   wrap.appendChild(br);  } </script>

* {  padding : 0px;  margin : 0px;  }