在fvs中，用的js弹出对话框，打开另一cpt模板，怎样让关闭按钮默认不隐藏？

js代码如下：

"use document"

const iframe = document.createElement("iframe");

var url = xxx;

var W = document.body.clientWidth; // 获取屏幕宽度  

var H = document.body.clientHeight; // 获取屏幕高度  

var WDia = 550; // 弹窗宽度  

iframe.width = "100%";

iframe.height = "100%";

iframe.scrolling = "no";

iframe.style.border = "0";

iframe.src = url;

duchamp.showDialog({

  title: "附注",

  width: WDia,

  height: H,

  innerContent: iframe,

  //padding: "15px",

  //titleStyle: { fontSize: "24px",color:"white", fontWeight: "bold" },

  //backgroundStyle: { background:"#f5f8fc" },

  //dialogType:"center",

  //line: { type: "color", value: { color: "red" } },

  //coordinate: [300, 240],

});