最后加一句

$(".fr-core-panel-title").eq(0).css({"color":"red","font-family":"microsoft yahei","font-size":"14px","text-align":"center"}) ; //窗体标题颜色大小居中

----------------------

按钮弹出窗口js代码

var url = FR.cjkEncode("/webroot/decision/view/report?viewlet=GettingStarted.cpt&op=write");

//窗体

var $iframe = $("<iframe id='inp' name='inp' width='100%' height='100%' scrolling='no' frameborder='0'>");

//将窗体的src属性设置为模板路径

$iframe.attr("src", url);

//窗体的属性

var o = {

    title: "对话框",    //标题

    width: 680,         //宽度

    height: 640,        //高度

    //closable:true,    //是否显示关闭按钮，默认true

    //confirm:true,     //是否添加确认取消按钮,默认false

    //draggable:true   //是否可拖动，默认true

};

//弹出窗体

FR.showDialog(o.title, o.width, o.height, $iframe, o);

$(".fr-core-panel-title").eq(0).css({"color":"red","font-family":"microsoft yahei","font-size":"14px","text-align":"center"}) ; //窗体标题颜色大小居中

const style = document.createElement('style');

  style.innerText = `.fr-core-panel-title{text-align:center}`;

  document.head.appendChild(style);