的HtmlUnit不能點擊表格元素內的按鈕

Question

我試圖點擊搜索按鈕在這個網站：http://www.amadeusepower.com/trek/portals/trek/default.aspx?Culture=en-US

但因爲返回的頁面是一樣的顯然是不能點擊舊頁面。它需要返回顯示此搜索結果的頁面。

我試過htmlunitscripter，但它似乎並不知道我點擊了按鈕，它不會生成它的代碼。我試過：

HtmlElement theElement5 = (HtmlElement) page.getElementById("ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch"); 
page = (HtmlPage) theElement5.click(); 

但它不起作用（返回舊頁面）。我在selenium中嘗試了下一個代碼，它工作正常，但是我不能使用硒，因爲它在我嘗試在Web服務中使用它時會導致問題。

WebElement searchbutton = driver.findElement(By.id("ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch")); 
searchbutton.click(); 

我該如何到達htmlunit中的這個按鈕？我沒有嘗試xpath，因爲我不知道如何獲取元素。有人可以看看該網站，並提出解決方案，以達到並點擊此按鈕？

編輯：

當我試圖這樣一個

page.executeJavaScript("var elem = document.getElementById('ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch'); elem.click();"); 

它拋出該異常。

May 29, 2013 8:23:41 PM com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine handleJavaScriptException 
INFO: Caught script exception 
======= EXCEPTION START ======== 
EcmaError: lineNumber=[1] column=[0] lineSource=[<no source>] name=[TypeError] sourceName=[injected script] message=[TypeError: Cannot find function click in object [object HTMLSpanElement]. (injected script#1)] 
com.gargoylesoftware.htmlunit.ScriptException: TypeError: Cannot find function click in object [object HTMLSpanElement]. (injected script#1) 
at  com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:669) 
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:601) 
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507) 
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:555) 
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:530) 
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptIfPossible(HtmlPage.java:979) 
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScript(HtmlPage.java:947) 
at eko.htmlunit.ekoht.main(ekoht.java:63) 
Caused by: net.sourceforge.htmlunit.corejs.javascript.EcmaError: TypeError: Cannot find function click in object [object HTMLSpanElement]. (injected script#1) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3603) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3587) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError(ScriptRuntime.java:3608) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError2(ScriptRuntime.java:3624) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.notFunctionError(ScriptRuntime.java:3688) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.getPropFunctionAndThisHelper(ScriptRuntime.java:2207) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.getPropFunctionAndThis(ScriptRuntime.java:2189) 
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1333) 
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:798) 
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:105) 
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:405) 
at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:275) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3031) 
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:115) 
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:546) 
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:654) 
... 7 more 
Enclosed exception: 
net.sourceforge.htmlunit.corejs.javascript.EcmaError: TypeError: Cannot find function click in object [object HTMLSpanElement]. (injected script#1) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3603) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3587) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError(ScriptRuntime.java:3608) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.typeError2(ScriptRuntime.java:3624) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.notFunctionError(ScriptRuntime.java:3688) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.getPropFunctionAndThisHelper(ScriptRuntime.java:2207) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.getPropFunctionAndThis(ScriptRuntime.java:2189) 
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1333) 
at script(injected script:1) 
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:798) 
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:105) 
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:405) 
at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:275) 
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3031) 
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:115) 
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:546) 
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:654) 
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:601) 
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507) 
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:555) 
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:530) 
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptIfPossible(HtmlPage.java:979) 
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScript(HtmlPage.java:947) 
at eko.htmlunit.ekoht.main(ekoht.java:63) 
======= EXCEPTION END ======== 

顯然它找不到元素的點擊功能。還有什麼可以做的？

Answer 1

你可以嘗試通過JS執行調用，看看它的工作原理是這樣：

JS應該是這樣的：

var elem = document.getElementById('ctl00_ctl00_ctl00_cph1_cph1_QuickSearchAll1_QuickFlightSearchControl1_btnSearch'); elem.click();