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net.sourceforge.htmlunit.corejs.javascript.EvaluatorException: invalid return (javascript url#88)	at com.gargoylesoftware.htmlunit.javascript.StrictErrorReporter.error(StrictErrorReporter.java:65)	at net.sourceforge.htmlunit.corejs.javascript.Parser.addError(Parser.java:188)	at net.sourceforge.htmlunit.corejs.javascript.Parser.addError(Parser.java:167)	at net.sourceforge.htmlunit.corejs.javascript.Parser.reportError(Parser.java:255)	at net.sourceforge.htmlunit.corejs.javascript.Parser.reportError(Parser.java:244)	at net.sourceforge.htmlunit.corejs.javascript.Parser.reportError(Parser.java:237)	at net.sourceforge.htmlunit.corejs.javascript.Parser.returnOrYield(Parser.java:1632)	at net.sourceforge.htmlunit.corejs.javascript.Parser.statementHelper(Parser.java:1022)	at net.sourceforge.htmlunit.corejs.javascript.Parser.statement(Parser.java:928)	at net.sourceforge.htmlunit.corejs.javascript.Parser.parse(Parser.java:572)	at net.sourceforge.htmlunit.corejs.javascript.Parser.parse(Parser.java:492)	at net.sourceforge.htmlunit.corejs.javascript.Context.compileImpl(Context.java:2660)	at net.sourceforge.htmlunit.corejs.javascript.Context.compileString(Context.java:1623)	at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory$TimeoutContext.compileString(HtmlUnitContextFactory.java:172)	at net.sourceforge.htmlunit.corejs.javascript.Context.compileString(Context.java:1615)	at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$2.doRun(JavaScriptEngine.java:720)	at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:889)	at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:628)	at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:515)	at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:729)	at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:694)	at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:746)	at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptIfPossible(HtmlPage.java:902)	at com.gargoylesoftware.htmlunit.html.HtmlAnchor.doClickStateUpdate(HtmlAnchor.java:114)	at com.gargoylesoftware.htmlunit.html.HtmlAnchor.doClickStateUpdate(HtmlAnchor.java:179)	at com.gargoylesoftware.htmlunit.html.DomElement.click(DomElement.java:800)	at com.gargoylesoftware.htmlunit.html.DomElement.click(DomElement.java:747)	at com.gargoylesoftware.htmlunit.html.DomElement.click(DomElement.java:694)	at clickPage.main(clickPage.java:38)