JS判断一个页面是否已经打开

时间 2019-12-02
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<!DOCTYPE html>
<html>
	<head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Test</title>
    </head>
     <script type="text/javascript"> 
        var objWin; 
        function isOpen(id) { 
            //目标页面 
            var target = "pop.html?id="+id; 
            //判断是否打开 
            if (objWin == null || objWin.closed) { 
                objWin = window.open(target); 
            } else { 
                objWin.location.replace(target); 
            } 
            //objWin.focus(); 
        } 
              
    </script>
    <body>
        <a href="javascript:isOpen(1);">A页面1</a><br>
        <a href="javascript:isOpen(2);">A页面2</a><br>
        <a href="javascript:isOpen(3);">A页面3</a><br>
    </body>
</html>