anchor.diff:      format:'m/d/Y',
       onShow:function( ct ){
        this.setOptions({
  +      minDate: 0,
         maxDate:jQuery('#date_timepicker_end').val()?jQuery('#date_timepicker_end').val():false
        })
       },
  
positive.code: 	<div class="ui form">
    	<div class="field">
  			<label>Start</label>
        <input id="date_timepicker_start" type="text" readonly="readonly">
  		</div>
  	</div>
  
  
negative.code:   <div class="ui form">
      <div class="field">
        <label>End</label>
        <input id="date_timepicker_end" type="text">
      </div>
    </div>
  
  