求解

由于该控件目前不可见、未启用或其类型不允许,因此无法将焦点移向它。   
这种错误怎么办贴出部分代码：
<SCRIPT language="javascript" type="text/javascript"
src="<%=request.getContextPath()%>/js/comm/mySubmitWait.js"></SCRIPT><script type="text/javascript">function transfer(){

addHeight();
historySearch();
}function historySearch(){
var msWait = new MySubmitWait();
msWait.showSysDiv();
}var addH=1;
function addHeight() {

    var a = document.getElementById("ceng");
    var div1 = document.getElementById("div1");
   
    
    var c = document.activeElement.name;
    if(c=="1"){
    a.style.display="";
    var b = document.getElementById("content").value;
    document.getElementById("neirong").value =b;
    }else if(c=="2"){
     div1.style.display="";
     var d =document.getElementById("result");
     document.getElementById("wenben").value =d.value;
    }
} function change(){
var b = document.getElementById("neirong").value;
document.getElementById("content").value=b

  }
  function change1(){
   var c = document.getElementById("wenben").value;
document.getElementById("result").value=c;
  }
  
  function closediv1(){
   document.getElementById("ceng").style.display="none";
   document.getElementById("backGroundDiv").style.display="none";
  }
  
  function closediv2(){   document.getElementById("div1").style.display="none";
    document.getElementById("backGroundDiv").style.display="none";
  }</script>
  <tr>
 
  
<td class="lmtd2">
案例备注 </td>
<td class="lmtd3" colspan="2" >
<html:textarea property="content" styleId="content" rows="4" style="width:'300'"/> </td>
<td class="lmtd2"><input type="button" value="放大" class="tool_bigger" onclick="transfer()" name="1" /></td>
<td class="lmtd3"></td>
<td class="lmtd3"></td>
<td class="lmtd2" id="a5" > 不满意原因<span class="STYLE1"></span> </td><!-- 添加 不满意愿意 输入框 author zrx 2010-06-13 -->
<td class="lmtd3" id="a6" colspan="2" ><html:textarea property="discontentCause" rows="4" style="width:'300'" /></td>
</tr>
<tr>
<td class="lmtd2"> 质检情况<span class="STYLE1"></span> </td>
<td class="lmtd3" colspan="2" ><html:textarea property="result" styleId="result" rows="4" style="width:'300'"/></td>
<td class="lmtd2"><input type="button" value="放大" class="tool_bigger" onclick="transfer()" name="2" /></td>
<td class="lmtd3"></td>
<td class="lmtd3"></td>
</tr>
</table>

<!-- add by lxc  -->



<div id="ceng" style="display:'none';z-index:'100000';position:'absolute';left:'0';top:'0'">
<table>
<tr>
  <td>
<textarea id="neirong" onchange="change()"  style="width:'300';height:'300';zindex:'4';position:'absolute';top:'400';left:'410'"></textarea>
  </td>
  <td>
    <a onclick="closediv1()">
                              <img src="../img/close3.gif" hspace="6" border="0"  style="width:'84';height: '11'; position: 'absolute'; top: '700';left:'620' " ></img>
                        </a>
          </td>
 </tr>
</table>
</div>
<div id="div1" style="display:'none';z-index:'10000000';position:'absolute';left:'0';top:'0'">
<table>
<tr>
  <td>
        <textarea id="wenben" onchange="change1()"  style="width:'300';height:'300';zindex:'4';position:'absolute';top:'400';left:'410'"></textarea>
      </td>
      <td>
        <a onclick="closediv2()">
                              <img src="../img/close3.gif" hspace="6" border="0"  style="width:'84';height: '11'; position: 'absolute'; top: '700';left:'620' " ></img>
                        </a>
      </td>
    </tr>
</table>
</div>