跨域关闭检测

gistfile1.txt

<SCRIPT LANGUAGE="JavaScript">  
              window.onload=function(){  
                document.getElementById("open").onclick=function(){  
                    var url="http://pinban.com/oauth/weibo/binding/";  
                    var win=window.open(url);  
                    var timer = setInterval((function(win){
                        return function(){  
                            if (win.closed) {  
                                alert("fuck off!!");
                                clearInterval(timer);
                            }
                        };
                    })(win),1000);
                }  
            }  
        </SCRIPT>  
        <input id="open" type="button" value="open"/>