var prepare_slider = function(){
	
	var x_pos = 0;
	var li_items_n = 0;	
	var li_col = $('sliderlist').getElements('li');

	li_col.each(function(li, index){
		size = li.getSize();
		x_pos += 198;
		li_items_n++;
	})
	
	$('slider_list').setStyle('position','relative');
	$('slider_list').setStyle('left','10px');
	

	$('slider_list').setStyle('width', x_pos+'px');
	
	var myFx = new Fx.Tween($('slider_list'), {transition: Fx.Transitions.Sine.easeOut, duration:700});
	myFx.addEvent('start', function(){ is_playing = true; });
	myFx.addEvent('complete', function(){ is_playing = false; });

	var is_playing = false;

	$('left').addEvent('click', function(){
		cur_offset = $('slider_list').getStyle('left').toInt();
		if (!is_playing && ((cur_offset + 197) <= 0)) myFx.start('left',   cur_offset + 197 + 'px');
	});

	$('right').addEvent('click', function(){
		var is_playing = false;
		cur_offset = $('slider_list').getStyle('left').toInt();
		if (!is_playing && ((cur_offset - 197) >= -1721 )) myFx.start('left', cur_offset - 197 + 'px');
	});	
}