How to Work with jQuery UI Slider using selenium webdriver a

import java.util.List;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.Point;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.firefox.FirefoxProfile;
import org.openqa.selenium.firefox.internal.ProfilesIni;
import org.openqa.selenium.interactions.Action;
import org.openqa.selenium.interactions.Actions;


public class TestjQuerySlider {
    public static void main(String[] args) throws InterruptedException {
        ProfilesIni allProfiles = new ProfilesIni();
        FirefoxProfile myProfile = allProfiles.getProfile("MyTestProfile");
        myProfile.setPreference("capability.policy.default.Window.frameElement.get","allAccess");
        WebDriver myTestDriver = new FirefoxDriver(myProfile);
        myTestDriver.manage().window().maximize();
        myTestDriver.manage().timeouts().implicitlyWait(1L,TimeUnit.SECONDS);
        myTestDriver.get("http://tinyurl.com/pvpk7o");

    Thread.sleep(5000L);

    try {
        List<WebElement> AlliFrameID = myTestDriver.findElements(By.tagName("iframe"));
        System.out.println(AlliFrameID.size());
        for(int i=0;i<=AlliFrameID.size();i++){
            System.out.println(AlliFrameID.get(i).getAttribute("class"));
        }
    } catch (Exception e) {
            myTestDriver.switchTo().frame(myTestDriver.findElement(By.className("demo-frame")));

                Point MyPoint= myTestDriver.findElement(By.xpath("//*[@id='slider']/a")).getLocation();

                WebElement someElement = myTestDriver.findElement(By.xpath("//*[@id='slider']/a"));

                System.out.println(MyPoint.x+"--------"+MyPoint.y);


                Actions builder = new Actions(myTestDriver);

                Action dragAndDrop =  builder.clickAndHold(someElement).moveByOffset(100,5).release().build();

                dragAndDrop.perform();
            }

    }
}