js colspan and rowspan

colspan==>colSpan  
  rowspan==>rowSpan

<script>

     o.colspan = "X";//无效

     o.colSpan = "X";//有效 

</script>

插入行

rowList = admin.insertRow(admin.rows.length);//有效

rowList.innerHTML = "<td>sdsfsf</td>";//无效

var _td = document.createElement("td");

rowList.appendChild(_td);//有效