# onMouseDown

### Description

@short: Fires when the user clicks on a scheduler's element that doesn't have the predefined 'onlick' handler

@signature: onMouseDown: (className: string) =\> void

### Parameters

- `className` - (required) *string* - the name of a css class defined for the clicked element

### Example

~~~jsx
scheduler.attachEvent("onMouseDown", function(className){
    //any custom logic here
});
~~~

### Details

Scheduler's elements that have the predefined 'onclick' handlers are listed in the table below.

<br>

<table class="list" cellspacing="0" cellpadding="5" border="0">
  <caption class="caption">
  <strong>Table 1 </strong>
  Scheduler's elements with predefined 'onclick' handlers
  </caption>
  <thead>
  <tr>
  <th>
  Class name
  </th>
  <th>
  Element
  </th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>dhx_cal_event_line</td>
  <td>Multi-day events in the Day, Week, Month, Units views and any event in the Timeline view</td>
  </tr>
  <tr>
  <td>dhx_cal_event_clear</td>
  <td>One-day events in the Month view</td>
  </tr>
  <tr>
  <td>dhx_event_move</td>
  <td>The header of the event's box used to drag the event in the Day, Week, Units views</td>
  </tr>
  <tr>
  <td>dhx_wa_ev_body</td>
  <td>An event in the WeekAgenda view</td>
  </tr>
  <tr>
  <td>dhx_event_resize</td>
  <td>The lower part of the event's box used to resize the event in the Day, Week, Units views </td>
  </tr>
  <tr>
  <td>dhx_scale_holder</td>
  <td>A column in the Day, Week, Units views</td>
  </tr>
  <tr>
  <td>dhx_scale_holder_now</td>
  <td>A highlighted column with the current date in the Day, Week, Units views</td>
  </tr>
  <tr>
  <td>dhx_month_body</td>
  <td>A cell without header in the Month view</td>
  </tr>
  <tr>
  <td>dhx_matrix_cell</td>
  <td>A cell in the Timeline view</td>
  </tr>
  <tr>
  <td>dhx_marked_timespan</td>
  <td>Marked (highlighted) cells</td>
  </tr>
  <tr>
  <td>dhx_time_block</td>
  <td>Blocked cells</td>
  </tr>
  </tbody>
</table>