报告bug：图片初始位置选择左下/右下时，前端显示会有异常

[dodu2014]

如果选择左下，前端对广告的样式时这样的：

<div id="ad_3" class="ads-float ads-float-left" style="position: absolute; width: 300px; height: 100px; z-index: 10500; display: block; left: 0px; bottom: 120px; top: -220px;"><div style="width: 300px; height: 100px; position: absolute; left: 0px; top: 0px;"><a href="http://www.baidu.com" target="_blank"><img src="/upload/images/2022/2/181f933fedd9836e.jpeg" style="width: 300px; height: 100px; " border="0"></a></div>
<div class="ads-float-close" style="width: 300px; height: 18px; position: absolute; left: 0px; top: 100px; background: url(&quot;/assets/advertisement/close.gif&quot;) right center no-repeat rgb(235, 235, 235); cursor: pointer;" onclick="document.getElementById('ad_3').style.display = 'none';"></div>
</div>

样式的style：bottom: 120px; top: -220px; 这样，就看不到显示的广告内容了