js 如何判断google浏览器的弹出框被拦截？

<br> checkwindow();<br> function checkwindow(){<br><br> var url = &quot;../aa.aspx&quot;;<br> win = window.open(url,&quot;&quot;,&quot;height=1px,width=1px,top=10000,left=10000,toolbar=no,menubar=no,scrollbars=no,resizable=no,location=no,status=no&quot;);<br> if (win == null || win == false) {<br> var a=document.getElementById(&quot;openpage&quot;);<br> document.getElementById(&quot;openpage&quot;).innerHTML=&quot;<B><font color='red'>你IE浏览器弹出窗口被拦截了~<font></B>&quot;;<br> }<br> }<br> 这个方法我已经用过了~不顶用~<br> js 如何判断google浏览器的弹出框被拦截？</p>