浮动窗口问题!？

Question

定义一个 flag 标示 show.htm 是否打开
setTimeOut(...)

Answer 1

function openwindow() {
 wnd = window.open(newURL,"","width=600,height=300,top=150,left=150");
}
1.setTimeOut(openwindow(),1000)
2.onunload=openwindow() 3 wnd = window.open(newURL,"","width=600,height=300,top=150,left=150");
<script Language="JavaScript">
var wnd;
function window_unload(){
  if(wnd) {
    wnd.close();
  }
}
 </script>

Answer 2

function openwindow() {
 wnd = window.open(newURL,"","width=600,height=300,top=150,left=150");
}
1.setTimeOut("openwindow()",1000)
2.onunload=openwindow() 3 wnd = window.open(newURL,"","width=600,height=300,top=150,left=150");
<script Language="JavaScript">
var wnd;
function window_unload(){
  if(wnd) {
    wnd.close();
  }
}
 </script>