var ini_start = -700;

var final_end = 15;

var t;



function move_in()

{	

	var el = document.getElementById('my_slider');

	ini_start = ini_start + 15;

	if (ini_start >= 15)

	{

		stop_count();

	}

	else

	{

		el.style.top = (ini_start) + 'px';

		t = setTimeout("move_in()",1);	

	}

	

}



function move_out()

{

	var el = document.getElementById('my_slider');

	final_end = final_end - 30;

	if (final_end <= -1000)

	{

		stop_count();

	}

	else

	{

		el.style.top = (final_end) + 'px';

		t = setTimeout("move_out()",1);	

	}



}



function stop_count()

{

	clearTimeout(t);

	ini_start = -700;

	final_end = 15;

}



function slider_left()

{

	var el = document.getElementById('my_slider');

	my_width = 500;

	scr_width = screen.width;	

	my_left = (scr_width/2) - (my_width/2);

	el.style.left = (my_left) + 'px';

}