JavaScript问题

row = document.getElementById("detail").insertRow(document.getElementById("detail").rows.length);
var index = row.rowIndex;
row.className="text4";
 
var col=document.createElement("TD");
row.appendChild(col);
col.innerHTML=' <td align="center" bgcolor="#FFFFFF" class="text4">
                <s:select name="ryid" list="#request.ryid" listKey="id" listValue="ryxm" 
                  headerKey="-1" headerValue="%{getText('page.select.please')}"             
                  onfocus="this.className='textfield_100px'" onblur="this.className='textfield_100px'" 
                  cssClass="select100px"/> </td>'
col.align='center';


总是提示：
col.innerHTML=' <td align="center" bgcolor="#FFFFFF" class="text4">
                <s:select name="ryid" list="#request.ryid" listKey="id" listValue="ryxm"  <