现在类似Google Toolbar的工具条几乎都提供了弹出窗口阻挡的功能，但是在实际WEB开发工作中许多情况下还是需要自动谈出窗口，因此需要检测并提醒用户禁用该功能。
在使用MSN Webmessenger时，发现它可以告诉我使用了弹出窗口阻挡功能，在分析它的代码后，提取出下面的程序，可以直接在自己的项目中使用，经过检验，确实可以检测到IE中google等工具条的阻挡情况，但是GoSurf等多线程浏览器的阻挡弹出页面阻挡却没有检测出来，我将使用多种浏览器做一个测试，将结果加上来。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><TITLE>弹出窗口检查</TITLE><META http-equiv=Content-Type content="text/html; charset=utf-8"><SCRIPT language=javascript>function openwindow(u,n,w,h){ var optionstring = "height=" + h + ",width=" + w + ",menubar=no,titlebar=yes,resizable=yes,scrollbars=no,status=no,toolbar=no"; window.open(u,n,optionstring);}var spbw = false;function ShowBlockerWarning(){ return spbw;}function Init(){ if (true == Detect()) { spbw = true; }}function Detect(){ var e = false; var pw1 = null; var pw2 = null; try { do { var d = new Date(); var wName = "ptest_" + d.getTime(); var testUrl = IsYBI() ? "popupTest.aspx" : ""; 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"); if (null == pw2 || true == pw2.closed) { e = true; break; } if (IsYBI()) { if (pw1 != pw2) { 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;}function IsYBI(){ var i = false; try { var xObj = new ActiveXObject("YBIOCtrl.CompanionBHO"); if (xObj==null) i = false; else i = true; } catch(ex) { i = false; } return i;}Init();</SCRIPT><SCRIPT language=javascript>var warningMessage = "检查到使用了弹出窗口阻挡器！Pop-up blocker detected.";var warningInformation = "请确保浏览器允许本网站打开弹出窗口。";var g_blockerHtml;g_blockerHtml = "<div><table border=1 cellspacing=0 cellpadding=0>";g_blockerHtml += "<tr><td>" + warningMessage + "</td></tr>";g_blockerHtml += "<tr><td>" + warningInformation + "</td></tr>";g_blockerHtml += "</table></div>";</SCRIPT><SCRIPT language=javascript>var messengerWindow = null;function OnLoad_WelcomePage(){ if ( ShowBlockerWarning() ) { var messageObject = document.getElementById("noPopHtml"); if (null != messageObject) { messageObject.innerHTML = g_blockerHtml; } }}</SCRIPT></HEAD><BODY onload=OnLoad_WelcomePage();><SPAN id=noPopHtml></BODY></HTML>
