使用javascript判断IE是否阻止弹出窗口

// 判断是否允许弹出窗口

    function IsPopupDisabled()

    {

     var e = false;

     var pw1 = null;

     var pw2 = null;

     try

     {

      do

      {

       var d = new Date();

       var wName = "ptest_" + d.getTime();

       var testUrl = "";

       pw1 = window.open(testUrl,wName,"width=0,height=0,left=5000,top=5000",true);

       if (null == pw1 || true == pw1.closed)

       {

        e = true;

        break;

       }

       pw2 = window.open(testUrl,wName,"width=0,height=0,left=5000,top=5000");

       if (null == pw2 || true == pw2.closed)

       {

        e = true;

        break;

       }

       pw1.close();

       pw2.close();

       pw1 = pw2 = null;

      }

      while(false);

     }

     catch(ex)

     {

      e = true;

     }

     if (null != pw1)

     {

      try { if (!pw1.closed) pw1.close(); } catch(ex){}

     }

     if (null != pw2)

     {

      try { if (!pw2.closed) pw2.close(); } catch(ex){}

     }

     return !e;

    }