setTimeout(function() {

    var _url = '***';

    $("div[widgetname=BUTTON0]").css({

        "background-image":"url("+_url+")",

        "background-repeat": "no-repeat",

        "background-size": "100%"

    });

      //改变控件颜色

    $(".fr-trigger-btn-up").css("background","#00783d");

    $(".fr-trigger-texteditor").css("background","#e5f2ec");

    $("div[widgetname=FORMSUBMIT0]").children().css("background","#00783d");

    $("div[widgetname=BUTTON1]").children().css("background","#00783d");

     $("div[widgetname=BUTTON2]").children().css("background","#00783d");

}, 500);

更改下拉框样式，分页预览不起作用，分析预览可以用