无法从隐藏的RadComboBox

Question

如果我能得到以下问题的解决方案，那将非常有帮助。

我无法从隐藏的Radcombobox中选择某个项目。下面的代码只启用了字段，我可以看到组合框在几分之一秒内下降，但未指定项目指定。请帮我纠正我的代码。

HTML脚本

<a id="cmb_40_Arrow" style="overflow: hidden;display: block;position: relative;outline: none;">select</a>

Java代码

((JavascriptExecutor)driver).executeScript("arguments[0].click();", getElement("InterPoint"));                             //This is the combobox field        
new FluentWait<WebDriver>(driver)        
.withTimeout(1000, TimeUnit.SECONDS).pollingEvery(1, TimeUnit.SECONDS)      
.ignoring(NoSuchElementException.class)        
.ignoring(StaleElementReferenceException.class)        
.until(new Function<WebDriver, Boolean>() {        
@NotNull        
@Override         
public Boolean apply(WebDriver webDriver) {        
WebElement element = getElement("CustomerPole");       /*This is the item from the field "Interpoint"*/        
return element != null && element.isDisplayed();        
  }        
});   

尝试了下面的代码，它不起作用

//waitpgm.until(ExpectedConditions.visibilityOfElementLocated(By.xpath(" //*[@id='pnlHeaderInterconnectionPointInformation']"))).click();    
//waitpgm.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//*[@id='cmb_40_DropDown']/div/ul/li[2]"))).click();    
//waitpgm.until(ExpectedConditions.elementToBeClickable(getElement("CustomerPole"))).click();