弹出新窗口的问题

Question

<script>
  var it;
  function a()
  {
    if(it==null || it.closed)
      it=window.open("unno.htm");
    else
      it.focus();
  }
</script>
<a href="javascript:a();">Click</a>  

Answer 1

父窗口
<input type=button onclick="openwin()">
<script>
var wid;
function openwin(){
   if (typeof(wid) != "object")
wid = window.open("focus.htm")  //focus.htm,是子窗口文件
   else
wid.focus();
}
</script>

Answer 2

改装了一下，好像这样这样有点问题
<script language="javaScript">
<!--
var win_array = new Array();
function win_open(clickURL,win_width,win_height,win_id){
//alert("begin");
if (typeof(win_array[win_id]) != "object"){
//if(win_array[win_id]==null || win_array[win_id].closed){
//alert("if");
win_array[win_id] = window.open(clickURL,"","width="+win_width+",height="+win_height+",top="+(screen.height-600)/2+",left="+(screen.width-800)/2+",scrollbars=no,status=no,fullscreen=4")
}
else{
//alert("else");
win_array[win_id].focus();
}
}
-->
</script>
<a href="javascript:win_open('message_index.asp',480,300,1);">测试11</a><br><a href="javascript:win_open('message_index.asp',200,200,2);">测试2</a>
要用if(win_array[win_id]==null || win_array[win_id].closed)监测才能通过