这样写是对的吗
function openWindow(){ var a=confirm("do you want to open the window?"); if(a==true) { var b=prompt("what site do you want to open:") if(b!=''){ window.open(b,'width=400','height=500','menubar','toolbar');} else{window.open('http://www.imooc.com/','width=400','height=500','menubar','toolbar');} }