Selenium : - Code to Login into drobbox.com

Code to Open dropbox.com & login is as follows - 

WebDriver driver; //declare object of WebDriver

driver = new FirefoxDriver(); //create object reference of Firefox driver

driver.get("http://dropbox.com"); //open dropbox.com

String parent = driver.getWindowHandle(); //read & store windows handle of parent browser

driver.findElement(By.linkText("Sign in")).click(); //click on Sing In link

//Switch to new window opened

for(String winHandle : driver.getWindowHandles()){ //iterate through all window open

   driver.switchTo().window(winHandle); //put focus to child browser window

}

driver.findElement(By.cssSelector("*[id='login_email']")).sendKeys("hello");//enter email

driver.findElement(By.cssSelector("*[id='login_password']")).sendKeys("hello"); //enter password

driver.findElement(By.name("login_submit_dummy")).click(); //click on Sign In button

driver.switchTo().window(parent); //return the control to parent browser