modal-overlay.html

<button class="btn btn-default" data-toggle="modal" data-target="#myModal">Launch demo modal</button>
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true" aria-label="Close">
          <span class="pficon pficon-close"></span>
        </button>
        <h4 class="modal-title" id="myModalLabel">Modal Title</h4>
      </div>
      <div class="modal-body">
        <form class="form-horizontal">
          <div class="form-group">
            <label class="col-sm-3 control-label" for="textInput">Field One</label>
            <div class="col-sm-9">
              <input type="text" id="textInput" class="form-control"></div>
          </div>
          <div class="form-group">
            <label class="col-sm-3 control-label" for="textInput2">Field Two</label>
            <div class="col-sm-9">
              <input type="text" id="textInput2" class="form-control"></div>
          </div>
          <div class="form-group">
            <label class="col-sm-3 control-label" for="textInput3">Field Three</label>
            <div class="col-sm-9">
              <input type="text" id="textInput3" class="form-control">
            </div>
          </div>
        </form>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Cancel</button>
        <button type="button" class="btn btn-primary">Save</button>
      </div>
    </div>
  </div>
</div>