var newWin = window.open('','newwindow','toolbar =no, menubar=no, scrollbars=no, resizeable=no, location=no, status=no');
newWin.document.write(`<body scroll="no" style="margin: 0px;padding: 0px;border:0px;overflow:hidden;">
<iframe style="margin: 0px;padding: 0px;border: 0px;width:100%;height:100%"
src="https://dazi.91xjr.com/typing/train/letter.html"></iframe></body>`);