更改BootStrappopover的默认样式及popover简单用法

.popover {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1060;
  display: none;
  max-width: 276px;
  padding: 1px;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.42857143;
  text-align: left;
  white-space: normal;
  background-color: #fff;
  -webkit-background-clip: padding-box;
  background-clip: padding-box;
  border: 1px solid #ccc;
  border: 1px solid rgba(0,0,0,.2);
  border-radius: 6px;
  -webkit-box-shadow: 0 5px 10px rgba(0,0,0,.2);
  box-shadow: 0 5px 10px rgba(0,0,0,.2);
}

 .popover{
   padding:6px;
  background-color:#000;
   color:#fff;
}

$('#freqsComboCheckbox').addClass('has-popover').attr('data-content', "Please Select Frequency!")
            .popover({
               placement: 'bottom',
               container: '.areaBox',//将popover附加到特定的元素上
              trigger: 'manual' //manual触发方式
            }).popover('show');

$(".has-popover").not($('#freqsComboCheckbox')).removeClass('has-popover').popover('destroy');