对select标签用ajax

1. 模版中代码：

<select name="status" id="status_id" onchange="select_change({$result.ID},this.value,'url值');">
		      <option value="0" selected="selected" >a</option>
		      <option value="1">s</option>
		    </select>

2. js中代码

function select_change(inquiry_id,status,url){    //
        
        
        $.ajax({
              type:"POST",url:url,dataType:'',//
              data: 'inquiry_id='+inquiry_id+'&status='+status,timeout: 2000,error:function(){},success:function(data){
                        if(data){
                                $("#tip").show();
                                $("#tips").hide();
                        }else{
				$("#info").show();
                        }
                  }
        });
        
       }

3. PHP中代码：

if (Input::is_ajax()) {
				// 
				$inquiry_id = (isset($_POST['inquiry_id'])) ? $_POST['inquiry_id'] : '';
				$status = (isset($_POST['status'])) ? $_POST['status'] : '';

				// 
				if(!empty($inquiry_id)){
					$result = Model_Admin_Inquiry_Detail::update_status($inquiry_id,$status);
		        		$json=array();
					$json[]=$result;	
					if($result==1){
			      			 echo json_encode($json);
					}
				}
				exit;
			}