//動態獲取主題數據
function getzts(){
    parentId = document.getElementById("bselect1").value;
    if(parentId!=""){
        dwrMethod.getZtList(parentId,callback5);
    }else{
        //清空主題Table的數據                  
        var t=document.getElementById("zhutiTable");  //獲取Table
        var length= t.rows.length;          //獲得Table下的行數
        if(length!=0){              //如果有行，則清空
            for(var i=length-1;i>=0;i--) 
            { 
             t.deleteRow(i);    
            }
        }
        var r = t.insertRow();
        var c = r.insertCell();
        c.innerHTML="暫無主題列表";
        document.getElementById('zhutiTable').appendChild(t);
    }
}
function callback5(provinces){
    var t=document.getElementById("zhutiTable");     //獲取Table
    var length= t.rows.length;             //獲得Table下的行數
    if(length!=0){                      //如果有行，則清空
        for(var i=length-1;i>=0;i--) 
            { 
                t.deleteRow(i);    
                } 
    }
    if(provinces.length>0){                          
        for (var i = 0; i < provinces.length; i++) {
            //tr
                    if(i%4==0){
                        var r = t.insertRow(t.rows.length);//創建新的行
                     }
                    //td 
            var c = r.insertCell();                //創建新的列
            c.innerHTML = "<input type='checkbox' name='zhutiIds' value="+provinces[i][0]+">"+provinces[i][1];
            }
    }else{
        var r = t.insertRow();
        var c = r.insertCell();
        c.innerHTML="暫無主題列表";
    }
    document.getElementById('zhutiTable').appendChild(t);
}

<tr>
    <td class="add_tit">成果類型</td>
    <td>
       <s:select id="bselect1" name="pruType1" onchange="getzts();"list="pTypeList" listKey="id" listValue="productionTypeName" headerKey="" headerValue="--  請選擇  --" />
       <label class="note4">*</label>
    </td>
</tr>
[html]
<tr>
     <td class="add_tit">主題</td>
     <td id="table1" style="padding-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;">
        <table id="zhutiTable" border="0" cellpadding="0" cellspacing="0" width=100% class="table_table">
       <tr>
        <td style="color: red;">注:請先選擇成果類型</td>
       </tr>
        </table>
     </td>
</tr>