table 动态 添加行 删除行

<% @ page language = " java "  pageEncoding = " utf-8 " %>
<% @ taglib prefix = " s "  uri = " /struts-tags " %>
<%
    String path  =  request.getContextPath();
    String basePath  =  request.getScheme()  +   " :// "
             +  request.getServerName()  +   " : "   +  request.getServerPort()
             +  path  +   " / " ;
%>
<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >
< html xmlns = " http://www.w3.org/1999/xhtml " >
< head >
     < base href = " <%=basePath%> "   />
     < meta http - equiv = " Content-Type "  content = " text/html; charset=utf-8 "   />
     < title > 泸州市机要局 -- 电子政务协同应用系统 </ title >
     < link rel = " stylesheet "  type = " text/css "  href = " <%=basePath%>css/main/style-list.css " ></ link >
     < script type = " text/javascript "  src = " <%=basePath%>js/lhgdialog/lhgdialog.js " ></ script >
</ head >

< body >
     < div  class = " mainBox " >
         < div  class = " searchBox "  style = " text-align: left; " >
             < label >
                 < input  class = " btnAll "  onclick = " addRow() "  type = " button "  value = " 增加行 "   />
                 < input  class = " btnAll "  onclick = " delMyRow() "  type = " button "  value = " 删除行 "   />
             </ label >     
         </ div >
         < table  class = " borderTable "  id = " borderTable "  border = " 0 "  cellpadding = " 0 "  cellspacing = " 0 " >
             < tr  class = " theadBg "  id = " title " >
                 < td >
                     < input id = " all "  type = " checkbox "  onclick = " SelectAll() "  style = " cursor: pointer; " />
                 </ td >
                 < td style = " width:160px; " > 所属区域 </ td >
                 < td style = " width:268px; " > 所属单位 </ td >
                 < td style = " width:140px; " > 所属部门 </ td >
                 < td style = " width:140px; " > 兼职职务 </ td >
                 < td style = " width:40px; " > 操作 </ td >
             </ tr >
         </ table >
     </ div >
</ body >
</ html >
< script type = " text/javascript " >
    var P  =  window.parent, D  =  P.loadinndlg();
    window.onload  =  function() {
        P.crebtn(  ' modify ' ,  ' 保 存 ' , savePortTime); 
        addRow();
    }
    function savePortTime() {
    }
    
    
    var index  =   1 ;
    var tb  =  $f( " borderTable " );
    var tbody;
     if (document.all) {  // IE 
         tbody = tb.childNodes[ 0 ]
    } else {  // FIREFOX 
        tbody  =  getFirstChild(tb);
    }  
    
    function $f(id) {
         return  document.getElementById(id);
    }
    function getFirstChild(obj)  {
        var result  =  obj.firstChild;
         while  ( ! result.tagName)  {
        result  =  result.nextSibling;
        }
         return  result;
    }
    
    function addRow() {
        var trnew  =  createTr(index, " partTimeTr " );
            try   {
            tbody.appendChild(trnew);
               index ++ ;
           } catch (err) {
                alert( " 添加行出错! " );
           }
    }
   function createTr(num,name) {
      var trnew  =  document.createElement( " tr " );
      trnew.id = name + num;
      
       // 选择框
      var td1  =  document.createElement( " td " );
      td1.innerHTML  =   " <input type='checkbox' name='checkbox1' id='checkbox " + num + " ' /> " ;
      trnew.appendChild(td1);
      
      var td2  =  document.createElement( " td " );
      td2.innerHTML  =   " <input type='text' name='regionName' id='regionName " + num + " ' style='width:140px;' onclick='setDiv1( " + num + " )'/> " +
                         " <input type='hidden' name='regionModel' id='regionModel " + num + " '/> " ;
      trnew.appendChild(td2);
      
      var td3  =  document.createElement( " td " );
      td3.innerHTML  =   " <input type='text' name='unitName' id='unitName " + num + " ' style='width:230px;'  onclick='setDiv2( " + num + " )'/> " +
                         " <input type='hidden' name='unitModel' id='unitModel " + num + " ' /> " ;
      trnew.appendChild(td3);
      
      var td4  =  document.createElement( " td " );
      td4.innerHTML  =   " <input type='text' name='departmentName' id='departmentName " + num + " ' style='width:130px;'  onclick='setDiv3( " + num + " )'/> " +
                         " <input type='hidden' name='departmentModel' id='departmentModel " + num + " ' " ;
      trnew.appendChild(td4);
      
      var td5  =  document.createElement( " td " );
      td5.innerHTML  =   " <input type='text' name='userTitle' id='userTitle " + num + " '/> " ;
      trnew.appendChild(td5);
      
    
      var td6  =  document.createElement( " td " );
      td6.innerHTML  =   " <input type='button' class='btnTxt' value='删除' onClick='delMyRow( " + num + " )'/> " ;
      trnew.appendChild(td6);
      
       return  trnew;
   }
   function delMyRow(num) {
            if  (typeof(num)  ==   " undefined " ) {
               var roleIds = document.getElementsByName( " checkbox1 " );
             for (var i = roleIds.length - 1 ;i >= 0 ;i -- ) {
                 if (roleIds[i].checked) {
                    var checkId  =  roleIds[i].id;
                    num  =  checkId.substr( 8 );
                    tbody.removeChild($f( " partTimeTr " + num));
                }
            }
           } else {
               tbody.removeChild($f( " partTimeTr " + num));
           }
    }
    
    
    function SelectAll() {
        var all  =  document.getElementById( ' all ' );
        var b  =  document.getElementsByName( " checkbox1 " );
            if (all.checked) {
                for (i = 0 ;i < b.length;i ++ ) {
                   b[i].checked = true ;
               }
           } else {
                for (i = 0 ;i < b.length;i ++ ) {
                   b[i].checked = false ;
               }
           }  
    }  
    
    
    function setDiv1(num)  {
        D.lhgdialog.opendlg( ' 选择所属区域 ' , ' <%=basePath%>jsp/user/sysRegionTree.jsp?num= ' + num, 240 , 450 , true , false , ' selectRegion ' );
    }
    
    function setDiv2(num)  {
        var roleName  =   " <s:property value='#session.sysUser.roleName' /> " ;
        var regionModel;
         if (roleName == " 单位管理员 " ) {
            regionModel </span