$(".fr-trigger-btn-ck").css("background", "white");$(".fr-trigger-ck").css({ 'backgroundImage': 'url(/webroot/help/down-one.png)no-repeat', 'background-size': '100% 100%' });
参考CSS修改控件样式-https://help.fanruan.com/finereport/doc-view-1367.html
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