手写一个弹窗功能

//调用方法
function getTip(tip, type) {
  
    var $tip = $('#tip');
    if ($tip.length == 0) {
      if(type == 'success') {
        $tip = $('<div id="tip" style="min-width: 160px;-webkit-box-sizing: border-box; box-sizing: border-box;  border-radius: 10px;  border-width: 1px; border-style: solid;border-color: #EBEEF5;position: fixed;left: 50%;top: 100px; height: 73px; line-height: 48px;text-align: center;background: #D1E7DD;"></div>');
        $('body').append($tip);
      } else {
          $tip = $('<div id="tip" style="min-width: 160px;-webkit-box-sizing: border-box; box-sizing: border-box;  border-radius: 10px;  border-width: 1px;color:#A02B39; border-style: solid;border-color: #EBEEF5;position: fixed;left: 50%;top: 100px; height: 73px; line-height: 48px;text-align: center;background: #F8D7DB;"></div>');
        $('body').append($tip);
      } 
    }
    $tip.stop(true).attr('class', 'alert alert-' + type).text(tip).css('margin-left', -$tip.outerWidth() / 2).fadeIn(500).delay(2000).fadeOut(500);
}

//例如:
getTip('操作成功','success');