public MainPage loginValidUser(String userName, String password) {
    	webDriver.findElement(By.id(UIMap.LoginDialog_login)).findElement(By.tagName("input")) .sendKeys(userName);
    	webDriver.findElement(By.id(UIMap.LoginDialog_password)).findElement(By.tagName("input")).sendKeys(password);
    	
    	WebDriverWait wait = new WebDriverWait(webDriver, 10);
    	WebElement element = wait.until(ExpectedConditions.elementToBeClickable(By.id(UIMap.LoginDialog_loginButton)));
    	element.click();
    	
    	
    	return new MainPage(webDriver);
    }

...
    element.click();
...

...
       	new Actions(webDriver).moveToElement(element).click(element).perform();
...