建议把图片放到/webroot/help/picture/目录下,也可以自己在webroot目录下新建目录,然后引用格式如下
setTimeout(function() {
$('div[widgetname="REPORT0"]').css("background","url(/webroot/help/picture/3.jpg)center center / 100% 100% no-repeat")
}, 200);
=============
setTimeout(function() {
$("div[widgetname= REPORT0]").css("background", "url(/webroot/help/picture/icon_top2-19.png)center center / 100% 100% no-repeat")
}, 800);