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copied!<p>The page you linked to uses a piece of Javascript that either triggers a bug in HtmlUnit (didn't find any open issue, though) or is just plain broken for non-Webkit browsers (page works fine in IE10, though).</p> <p>Somewhere in <a href="http://www.wwnorton.com/college/polisci/we-the-people8/shorter/ScriptResource.axd?d=MbaAqAahxi3YDYdaT925QiLtHLHAvOZRQla5c0b24vyov-s_NmaN35GrSancbN-o7j4MWzv8triPZWBoWhCikubtoi3jDnL2qzjlivaOEByeT8R6w9pSGqIU8xlzao1u1OUnUB_6K1s1R8tBtZBWFQ2&t=fffffffffd4601ba">this script</a>, some elements' <code>outerHTML</code> properties are set to <code>null</code> unless the browser is "not Safari"(*):</p> <pre><code>if (!$telerik.isSafari) { c.outerHTML = null; } if (!$telerik.isSafari) { a.outerHTML = null; } </code></pre> <p>(*) where "Safari" is revealed further downto actually mean "Webkit-based":</p> <pre><code>$telerik.isChrome = Sys.Browser.agent == Sys.Browser.Chrome; $telerik.isSafari4 = Sys.Browser.agent == Sys.Browser.WebKit && Sys.Browser.version >= 526; $telerik.isSafari3 = Sys.Browser.agent == Sys.Browser.WebKit && Sys.Browser.version < 526 && Sys.Browser.version > 500; $telerik.isSafari2 = Sys.Browser.agent == Sys.Browser.Safari; $telerik.isSafari = $telerik.isSafari2 || $telerik.isSafari3 || $telerik.isSafari4 || $telerik.isChrome; </code></pre> <p>I didn't bother to figure out what the obfuscated JS code wants to do with <code>outerHTML</code>, but it does fail a state check deep down in HtmlUnit's DOM manipulation code when executing the script:</p> <pre><code>java.lang.RuntimeException: Exception invoking setOuterHTML at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:669) ... Caused by: java.lang.IllegalStateException: Previous sibling for HtmlDivision[<div style="...">] is null. at com.gargoylesoftware.htmlunit.html.DomNode.insertBefore(DomNode.java:1036) at com.gargoylesoftware.htmlunit.javascript.host.html.HTMLElement.setOuterHTML(HTMLElement.java:1067) at ... </code></pre> <p>Telling HtmlUnit to identify as Chrome avoids both <code>outerHTML = null</code> assignments</p> <pre><code>WebClient client = new WebClient(BrowserVersion.CHROME); ... </code></pre> <p>and produces sensible looking output:</p> <pre><code>Chapter 15: The Federal Courts | We the People, 8e: W. W. Norton StudySpace W.W. Norton & Company Colorblind Mode: On | Off W. W. NORTON HOME | HELP | CREDITS We the People, 8e: A W. W. Norton StudySpace ... </code></pre> <p>This was a fun thing to track down.</p>

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