how to handle popups in selenium webdriver ?

[sourcecode language="java"]
import java.util.Iterator;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;


public class showModalDialog {


	public static void main(String[] args) {
		WebDriver myTestDriver = new FirefoxDriver();
		myTestDriver.get("http://tinyurl.com/6abw");
		myTestDriver.manage().window().maximize();
		myTestDriver.manage().timeouts().implicitlyWait(10,TimeUnit.SECONDS);

		// Create the set
		Set<String> codeprojectWindowID = myTestDriver.getWindowHandles();
		System.out.println("Main Window Handle ----------------- " + codeprojectWindowID);



		Iterator<String> it = codeprojectWindowID.iterator();

		while (it.hasNext()) {
		    // Get element
		    Object element = it.next();
		    System.out.println(element);
		}

		myTestDriver.findElement(By.xpath("//*[@id='ctl00_Bn']/tbody/tr[1]/td[3]/div/div[3]/span/span/a")).click();
		myTestDriver.findElement(By.xpath("//*[@id='ctl01_MC_MemberLogOn_OpenAuth']/a[2]/img")).click();
		System.out.println("Stand on " + myTestDriver.getTitle() + " Page");

		codeprojectWindowID = myTestDriver.getWindowHandles();
		it = codeprojectWindowID.iterator();
		String MainWindowHandle = it.next();
		String NewWindowHandle = it.next();
		System.out.println(MainWindowHandle);
		System.out.println(NewWindowHandle);

		//Thread.sleep(3000L);

		// go to Google Accounts Window
		myTestDriver.switchTo().window(NewWindowHandle);

		System.out.println("Stand on " + myTestDriver.getTitle() + " Page");
		//Click on Can't access your account?
		myTestDriver.findElement(By.xpath("//*[@id='link-forgot-passwd']")).click();

				// Go to 3rd popup window and click on Submit button - Google Account Recovery

				codeprojectWindowID = myTestDriver.getWindowHandles();

				it = codeprojectWindowID.iterator();
				it.next();
				it.next();

				String NewPopUPWindow = it.next();

				// Go to Google Account Recovery
				myTestDriver.switchTo().window(NewPopUPWindow);
				System.out.println("Stand on " + myTestDriver.getTitle() + " Page");

				myTestDriver.findElement(By.xpath("//input[@class='button g-button g-button-submit']")).click();


				System.out.println("Good bye " + myTestDriver.getTitle() + " Page");
				// Close all Opened windows

				// close Google Account Recovery
				myTestDriver.close();

				// go to Google Accounts window
				myTestDriver.switchTo().window(NewWindowHandle);
				System.out.println("Good bye " + myTestDriver.getTitle() + " Page");

				// Close Google Accounts Window
				myTestDriver.close();


				// GO to Member Log-on - CodeProject window
				myTestDriver.switchTo().window(MainWindowHandle);
				System.out.println("Good bye " + myTestDriver.getTitle() + " Page");
				//Close Member Log-on - CodeProject window
				myTestDriver.close();

	}

}

[/sourcecode]