Javascript Selenium Dropbox hidden为空

您好，我一直在使用SeleniumWebDriver，我有一个下一个Html的下拉列表

<div class="form_option">
    <label for="dia">Fecha de nacimiento: <sup>*</sup></label>
    <label id="errorDOB" class="error" style="display: none;"></label>
    <input id="dateOfBirth" style="display:none;" name="dateOfBirth" value="" class="selectized" type="text"/><input name="_D:dateOfBirth" value=" " type="hidden"/>
    <div class="third_one">
        <select name="dia" id="dia" required placeholder="Día">
            <option value="">Día</option>
        </select>
    </div>
    <div class="third_two">
        <select name="mes" id="mes" required placeholder="Mes">
            <option value="">Mes</option>
        </select>
    </div>
    <div class="third_three">
        <select name="anho" id="anho" required placeholder="Año">
            <option value="">Año</option>
        </select>
    </div>
</div>

我收到以下信息：

org.openqa.selenium.WebDriverException: document.getElementById(...) is null
Command duration or timeout: 382 milliseconds
Build info: version: '2.53.0', revision: '35ae25b', time: '2016-03-15 16:57:40'
System info: host: 'DES-ITE-27', ip: '172.17.168.14', os.name: 'Windows 8.1', os.arch: 'x86', os.version: '6.3', java.version: '1.8.0_77'
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{applicationCacheEnabled=true, rotatable=false, handlesAlerts=true, databaseEnabled=true, version=45.0.2, platform=WINDOWS, nativeEvents=false, acceptSslCerts=true, webStorageEnabled=true, locationContextEnabled=true, browserName=firefox, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: 313909be-60c3-42ea-8dbe-1cac6e3addde
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)
    at org.openqa.selenium.remote.RemoteWebDriver.executeScript(RemoteWebDriver.java:577)
    at Registro2.testRegistro2(Registro2.java:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.openqa.selenium.WebDriverException: document.getElementById(...) is null
Build info: version: '2.53.0', revision: '35ae25b', time: '2016-03-15 16:57:40'
System info: host: 'DES-ITE-27', ip: '172.17.168.14', os.name: 'Windows 8.1', os.arch: 'x86', os.version: '6.3', java.version: '1.8.0_77'
Driver info: driver.version: unknown
    at <anonymous class>.anonymous(about:blank line 69 > Function:1)
    at <anonymous class>.handleEvaluateEvent(about:blank:69)

org.openqa.selenium.WebDriverException:document.getElementById（…）为空
命令持续时间或超时：382毫秒
构建信息：版本：“2.53.0”，修订版：“35ae25b”，时间：“2016-03-15 16:57:40”
系统信息：主机：'DES-ITE-27'，ip:'172.17.168.14'，os.name:'Windows 8.1'，os.arch:'x86'，os.version:'6.3'，java.version:'1.8.0_77'
驱动程序信息：org.openqa.selenium.firefox.FirefoxDriver
功能[{applicationCacheEnabled=true，rotatable=false，handlesAlerts=true，databaseEnabled=true，version=45.0.2，platform=WINDOWS，nativeEvents=false，acceptSslCerts=true，WebStorage=true，locationContextEnabled=true，browserName=firefox，takesScreenshot=true，javascriptEnabled=true，CSSSelectorEnabled=true}]
会话ID:313909be-60c3-42ea-8dbe-1cac6e3addde
位于sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance（未知源）
位于sun.reflect.delegatingConstructor或AccessorImpl.newInstance（未知源）
位于java.lang.reflect.Constructor.newInstance（未知源）
位于org.openqa.selenium.remote.ErrorHandler.CreateTrowable（ErrorHandler.java:206）
位于org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed（ErrorHandler.java:158）
位于org.openqa.selenium.remote.RemoteWebDriver.execute（RemoteWebDriver.java:678）
位于org.openqa.selenium.remote.RemoteWebDriver.executeScript（RemoteWebDriver.java:577）
testRegistro2（Registro2.java:49）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（未知源）
在sun.reflect.DelegatingMethodAccessorImpl.invoke处（未知源）
位于java.lang.reflect.Method.invoke（未知源）
位于org.junit.runners.model.FrameworkMethod$1.runReflectVeCall（FrameworkMethod.java:50）
位于org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:12）
位于org.junit.runners.model.FrameworkMethod.invokeeexplosive（FrameworkMethod.java:47）
位于org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:17）
位于org.junit.internal.runners.statements.RunBefores.evaluate（RunBefores.java:26）
位于org.junit.internal.runners.statements.runafter.evaluate（runafter.java:27）
位于org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:325）
位于org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:78）
位于org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:57）
位于org.junit.runners.ParentRunner$3.run（ParentRunner.java:290）
位于org.junit.runners.ParentRunner$1.schedule（ParentRunner.java:71）
位于org.junit.runners.ParentRunner.runChildren（ParentRunner.java:288）
访问org.junit.runners.ParentRunner.access$000（ParentRunner.java:58）
位于org.junit.runners.ParentRunner$2.evaluate（ParentRunner.java:268）
位于org.junit.runners.ParentRunner.run（ParentRunner.java:363）
位于org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:50）
位于org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:38）
位于org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:467）
位于org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:683）
位于org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:390）
位于org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:197）
原因：org.openqa.selenium.WebDriverException:document.getElementById（…）为空
构建信息：版本：“2.53.0”，修订版：“35ae25b”，时间：“2016-03-15 16:57:40”
系统信息：主机：'DES-ITE-27'，ip:'172.17.168.14'，os.name:'Windows 8.1'，os.arch:'x86'，os.version:'6.3'，java.version:'1.8.0_77'
驱动程序信息：驱动程序。版本：未知
at.anonymous（关于：空行69>函数：1）
at.handleEvaluateEvent（关于：空白：69）

对我来说，选项不可见是合乎逻辑的，但我没有html中的选项来指示我要选择的选项，我认为这些选项是为JavaScript生成的，不在jsp中。 我不知道该怎么做才能显示每个组合框的值并完成完成我的工作的表单

org.openqa.selenium.WebDriverException: document.getElementById(...) is null
Command duration or timeout: 382 milliseconds
Build info: version: '2.53.0', revision: '35ae25b', time: '2016-03-15 16:57:40'
System info: host: 'DES-ITE-27', ip: '172.17.168.14', os.name: 'Windows 8.1', os.arch: 'x86', os.version: '6.3', java.version: '1.8.0_77'
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{applicationCacheEnabled=true, rotatable=false, handlesAlerts=true, databaseEnabled=true, version=45.0.2, platform=WINDOWS, nativeEvents=false, acceptSslCerts=true, webStorageEnabled=true, locationContextEnabled=true, browserName=firefox, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: 313909be-60c3-42ea-8dbe-1cac6e3addde
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)
    at org.openqa.selenium.remote.RemoteWebDriver.executeScript(RemoteWebDriver.java:577)
    at Registro2.testRegistro2(Registro2.java:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.openqa.selenium.WebDriverException: document.getElementById(...) is null
Build info: version: '2.53.0', revision: '35ae25b', time: '2016-03-15 16:57:40'
System info: host: 'DES-ITE-27', ip: '172.17.168.14', os.name: 'Windows 8.1', os.arch: 'x86', os.version: '6.3', java.version: '1.8.0_77'
Driver info: driver.version: unknown
    at <anonymous class>.anonymous(about:blank line 69 > Function:1)
    at <anonymous class>.handleEvaluateEvent(about:blank:69)