selenium用jquery改变元素属性

package com.webdirver.test;

import org.apache.commons.lang3.StringUtils;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

/**
 * selenium 引用jQuery改变页面元素属性
 * 
 * @author Administrator
 *
 */
public class LoadJQuery {
    private static WebDriver driver;

    /**
     * 向当前页面注入JQuery，并返回加载是否成功
     * 
     * @return
     */
    public boolean injectjQuery() {
        try {
            String injectJQuery = "var script = document.createElement(‘script‘);"
                    + "var filename = \"http://code.jquery.com/jquery-1.10.1.min.js\";"
                    + "script.setAttribute(\"type\",\"text/javascript\");"
                    + "script.setAttribute(\"src\", filename);"
                    + "if (typeof script!=‘undefined‘){"
                    + "document.getElementsByTagName(\"head\")[0].appendChild(script);"
                    + "}";
            ((JavascriptExecutor) driver).executeScript(injectJQuery);
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        // 判断JQuery是否加载成功
        Boolean loaded = true;
        String s = (String) (((JavascriptExecutor) driver)
                .executeScript("return typeof jQuery"));
        if (!StringUtils.trimToEmpty(s).equals("function"))
            loaded = false;
        return loaded;
    }

    public static void main(String[] args) {
        System.setProperty("webdriver.chrome.driver", "chromedriver.exe");
        driver = new ChromeDriver();
        driver.get("https://www.baidu.com/");
        // 删除input标签下的id属性
        JavascriptExecutor js = (JavascriptExecutor) driver;
        String changeDisplay = " $(‘input‘).removeAttr(‘id‘);";
        js.executeScript(changeDisplay);
        js = (JavascriptExecutor) driver;
        // 将百度按钮改成红色
        String changeinput = "$(\"input\").attr(\"style\",\"background:red\");";
        js.executeScript(changeinput);
    }
}