IBOutlet UISlider* pageSlider;
/* Slider Customization */
UIImage *sliderImg = [UIImage imageNamed:@"slider.png"];
UIImage *scaledImage = [UIImage imageWithCGImage:[sliderImg CGImage] scale:2.0 orientation:UIImageOrientationUp];
[pageSlider setThumbImage:scaledImage forState:UIControlStateNormal];

UIImage *sliderLeftTrackImage = [[UIImage imageNamed: @"slider_line.png"] stretchableImageWithLeftCapWidth: 9 topCapHeight: 0];
UIImage *sliderRightTrackImage = [[UIImage imageNamed: @"slider_line.png"] stretchableImageWithLeftCapWidth: 9 topCapHeight: 0];
[pageSlider setMinimumTrackImage: sliderLeftTrackImage forState: UIControlStateNormal];
[pageSlider setMaximumTrackImage: sliderRightTrackImage forState: UIControlStateNormal];

[pageSlider setValue:_pageNumber+1 animated:YES];