window.open回调的应用

var ref = top.window.open('url地址', '_blank', 'location=no');var myCallback = function(event) {    if (event.url.indexOf('sina_callback.jsp?uid') > 0) {        alert(event.url);        ref.close();    }}ref.addEventListener('loadstart', myCallback);

得到回调页面传过来的参数