高亮元素的思路是:
	  1.找到要高亮的元素
	  2.對該元素執(zhí)行js,更改style達到高亮效果。
	  操作隱藏的內(nèi)容思路:
	  1.可以用Actions的moveToElement,使鼠標懸停在觸發(fā)隱藏內(nèi)容的元素上。
	  2.也可以用js點擊觸發(fā)隱藏內(nèi)容的元素
	  下面是具體的代碼:
	package com.test;
	import java.sql.Driver;
	import org.openqa.selenium.By;
	import org.openqa.selenium.JavascriptExecutor;
	import org.openqa.selenium.WebDriver;
	import org.openqa.selenium.WebElement;
	import org.openqa.selenium.chrome.ChromeDriver;
	import org.openqa.selenium.interactions.Actions;
	import org.openqa.selenium.support.ui.ExpectedCondition;
	import org.openqa.selenium.support.ui.WebDriverWait;
	import bsh.commands.dir;
	public class TestHighLight {
	static WebDriver driver;
	public static void main(String[] args) {
	// TODO Auto-generated method stub
	driver = new ChromeDriver();
	driver.manage().window().maximize();
	driver.get("http://www.zhihu.com/#signin");
	driver.findElement(By.name("account")).sendKeys("XXX@163.com");
	driver.findElement(By.name("password")).sendKeys("XXX");
	WebElement login = driver.findElement(By.xpath("//*//button[text()='登錄']"));
	highl(driver, login);
	login.click();
	WebDriverWait wait = new WebDriverWait(driver, 10);
	WebElement element =wait.until(new ExpectedCondition<WebElement>() {
	@Override
	public WebElement apply(WebDriver dr) {
	// TODO Auto-generated method stub
	return dr.findElement(By.xpath("//*//span[text()='喬葉葉']"));
	}});
	/*
	* 使用js實現(xiàn)點擊目標,出現(xiàn)隱藏元素
	String js = "document.getElementsByClassName("name")[0].click()";
	((JavascriptExecutor)driver).executeScript(js);
	*/
	Actions action = new Actions(driver);
	action.moveToElement(element).perform();
	WebElement sixinElement = driver.findElement(By.id(":2"));//*[@id=":2"]
	highl(driver, sixinElement);
	try {
	Thread.sleep(3000);
	} catch (InterruptedException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
	}
	sixinElement.click();
	driver.quit();
	}
	static void highl(WebDriver dr, WebElement we) {
	((JavascriptExecutor)dr).executeScript("arguments[0].style.border="5px solid red"", we);
	}
	}
	  可以看下效果,把登錄按鈕高亮顯示,因為知乎加載主頁太慢,后面的操作隱藏元素的效果沒有截圖。
	