报表块初始化后事件:
setTimeout(function() {
$("div[widgetname= REPORT2_C].fr-titlelayout").css("background","url(/webroot/help/picture/background/fanruan.gif;)center center / 100% 100% no-repeat")},200);
参考决策报表动态背景插件-https://help.fanruan.com/finereport/doc-view-3347.html
或者JS实现动态波浪背景-https://help.fanruan.com/finereport/doc-view-3264.html