WdatePicker插件限制两个日期不得超过90天

<input id="endTime" name="bkjzsj" type="text"  class="xx_input" style="width:170px;" 
					onfocus="WdatePicker({readOnly:true,dateFmt:'yyyy-MM-dd HH:mm:ss',maxDate:'#F{$dp.$D(\'beginTime\',{d:90})||\'%y-%M-%d\'}',minDate:'#F{$dp.$D(\'beginTime\')}'})" />