<table id="dg" title="My Users" class="easyui-datagrid" style="width:550px;height:250px"
 url="get_users.php"
 toolbar="#toolbar"
 rownumbers="true" fitColumns="true" singleSelect="true">
 <thead>
 <tr>
 <th field="firstname" width="50">First Name</th>
 <th field="lastname" width="50">Last Name</th>
 <th field="phone" width="50">Phone</th>
 <th field="email" width="50">Email</th>
 </tr>
 </thead>
</table>
<div id="toolbar">
 <a href="#" class="easyui-linkbutton" iconCls="icon-add" plain="true" onclick="newUser()">New User</a>
 <a href="#" class="easyui-linkbutton" iconCls="icon-edit" plain="true" onclick="editUser()">Edit User</a>
 <a href="#" class="easyui-linkbutton" iconCls="icon-remove" plain="true" onclick="destroyUser()">Remove User</a>
</div>

$rs = mysql_query('select * from users');
$result = array();
while($row = mysql_fetch_object($rs)){
 array_push($result, $row);
}
 
echo json_encode($result);

<div id="dlg" class="easyui-dialog" style="width:400px;height:280px;padding:10px 20px"
 closed="true" buttons="#dlg-buttons">
 <div class="ftitle">User Information</div>
 <form id="fm" method="post">
 <div class="fitem">
 <label>First Name:</label>
 <input name="firstname" class="easyui-validatebox" required="true">
 </div>
 <div class="fitem">
 <label>Last Name:</label>
 <input name="lastname" class="easyui-validatebox" required="true">
 </div>
 <div class="fitem">
 <label>Phone:</label>
 <input name="phone">
 </div>
 <div class="fitem">
 <label>Email:</label>
 <input name="email" class="easyui-validatebox" validType="email">
 </div>
 </form>
</div>
<div id="dlg-buttons">
 <a href="#" class="easyui-linkbutton" iconCls="icon-ok" onclick="saveUser()">Save</a>
 <a href="#" class="easyui-linkbutton" iconCls="icon-cancel" onclick="javascript:$('#dlg').dialog('close')">Cancel</a>
</div>

function newUser(){
 $('#dlg').dialog('open').dialog('setTitle','New User');
 $('#fm').form('clear');
 url = 'save_user.php';
}

var row = $('#dg').datagrid('getSelected');
if (row){
 $('#dlg').dialog('open').dialog('setTitle','Edit User');
 $('#fm').form('load',row);
 url = 'update_user.php?id='+row.id;
}

function saveUser(){
 $('#fm').form('submit',{
 url: url,
 onSubmit: function(){
 return $(this).form('validate');
 },
 success: function(result){
 var result = eval('('+result+')');
 if (result.errorMsg){
 $.messager.show({
 title: 'Error',
 msg: result.errorMsg
 });
 } else {
 $('#dlg').dialog('close'); // close the dialog
 $('#dg').datagrid('reload'); // reload the user data
 }
 }
 });
}

function destroyUser(){
 var row = $('#dg').datagrid('getSelected');
 if (row){
 $.messager.confirm('Confirm','Are you sure you want to destroy this user?',function(r){
 if (r){
 $.post('destroy_user.php',{id:row.id},function(result){
 if (result.success){
 $('#dg').datagrid('reload'); // reload the user data
 } else {
 $.messager.show({ // show error message
 title: 'Error',
 msg: result.errorMsg
 });
 }
 },'json');
 }
 });
 }
}

<table id="dg" title="My Users" style="width:550px;height:250px"
 url="get_users.php"
 toolbar="#toolbar"
 fitColumns="true" singleSelect="true">
 <thead>
 <tr>
  <th field="firstname" width="50">First Name</th>
  <th field="lastname" width="50">Last Name</th>
  <th field="phone" width="50">Phone</th>
  <th field="email" width="50">Email</th>
 </tr>
 </thead>
</table>
<div id="toolbar">
 <a href="#" class="easyui-linkbutton" iconCls="icon-add" plain="true" onclick="newItem()">New</a>
 <a href="#" class="easyui-linkbutton" iconCls="icon-remove" plain="true" onclick="destroyItem()">Destroy</a>
</div>

$('#dg').datagrid({
 view: detailview,
 detailFormatter:function(index,row){
 return '<div class="ddv"></div>';
 },
 onExpandRow: function(index,row){
 var ddv = $(this).datagrid('getRowDetail',index).find('div.ddv');
 ddv.panel({
  border:false,
  cache:true,
  href:'show_form.php?index='+index,
  onLoad:function(){
  $('#dg').datagrid('fixDetailRowHeight',index);
  $('#dg').datagrid('selectRow',index);
  $('#dg').datagrid('getRowDetail',index).find('form').form('load',row);
  }
 });
 $('#dg').datagrid('fixDetailRowHeight',index);
 }
});

<form method="post">
 <table class="dv-table" style="width:100%;background:#fafafa;padding:5px;margin-top:5px;">
 <tr>
  <td>First Name</td>
  <td><input name="firstname" class="easyui-validatebox" required="true"></input></td>
  <td>Last Name</td>
  <td><input name="lastname" class="easyui-validatebox" required="true"></input></td>
 </tr>
 <tr>
  <td>Phone</td>
  <td><input name="phone"></input></td>
  <td>Email</td>
  <td><input name="email" class="easyui-validatebox" validType="email"></input></td>
 </tr>
 </table>
 <div style="padding:5px 0;text-align:right;padding-right:30px">
 <a href="#" class="easyui-linkbutton" iconCls="icon-save" plain="true" onclick="saveItem(<?php echo $_REQUEST['index'];?>)">Save</a>
 <a href="#" class="easyui-linkbutton" iconCls="icon-cancel" plain="true" onclick="cancelItem(<?php echo $_REQUEST['index'];?>)">Cancel</a>
 </div>
</form>

function saveItem(index){
 var row = $('#dg').datagrid('getRows')[index];
 var url = row.isNewRecord ? 'save_user.php' : 'update_user.php?id='+row.id;
 $('#dg').datagrid('getRowDetail',index).find('form').form('submit',{
 url: url,
 onSubmit: function(){
  return $(this).form('validate');
 },
 success: function(data){
  data = eval('('+data+')');
  data.isNewRecord = false;
  $('#dg').datagrid('collapseRow',index);
  $('#dg').datagrid('updateRow',{
  index: index,
  row: data
  });
 }
 });
}

function cancelItem(index){
 var row = $('#dg').datagrid('getRows')[index];
 if (row.isNewRecord){
 $('#dg').datagrid('deleteRow',index);
 } else {
 $('#dg').datagrid('collapseRow',index);
 }
}