向特定控件中添加数据问题

Question

为什么我用这条语句document.getElementById("listname").innerHTML="string";
有时能添加成功，有时候又失败？

Answer 1

<div>
<table class="list-line" cellspacing="1" cellpadding="3" rules="all" border="0" style="border-width:0px;">
<tr class="barbg" align="center">
<th scope="col">字段名</th><th scope="col">字段类型</th>
</tr><tr class="listbg">
<td>FID</td><td>esriFieldTypeOID</td>
</tr><tr class="listbg">
<td>Shape</td><td>esriFieldTypeGeometry</td>
</tr><tr class="listbg">
<td>AREA</td><td>esriFieldTypeDouble</td>
</tr><tr class="listbg">
<td>CODE</td><td>esriFieldTypeString</td>
</tr><tr class="listbg">
<td>NAME</td><td>esriFieldTypeString</td>
</tr><tr class="listbg">
<td>POP1991</td><td>esriFieldTypeDouble</td>
</tr><tr class="listbg">
<td>POP91_SQMI</td><td>esriFieldTypeDouble</td>
</tr>
</table>
</div>这是从后台生成的字符串，它返回给了
   function processCallbackResult1(script)
   {
     var str= "document.getElementById(\"fieldListDiv\").innerHTML="+"\""+script+"\"";
     eval(str);
   }
执行完后在id="fieldListDiv"的div控件中什么也没显示