怎么不出现prompt的提示窗口呢
function openWindow() {var open=confirm("确定打开吗"); if(open==true){ var url=prompt("打开下面网址","http://www.imooc.com/"); if(url!=null) {window.open('http://www.imooc.com/','_blank',width=500px,height=400px)} }; else {return;} else {return;} } 怎么就不出现prompt的提示窗口呢
