function init_slider(big_jump) {
	var position = 0;
	var hold = 0;
	var step = $('.slide').outerWidth();
	if (big_jump == true) {
		step *= 4;
	}
	
	var count = parseInt($('#slides div.slide').size());
	
	function arrowDisable() {
		(position==0) ? $('#arrow_left').css('display','none') : $('#arrow_left').css('display','block');
		(position+4 == count) ? $('#arrow_right').css('display','none') : $('#arrow_right').css('display','block');
	}
	
	arrowDisable();
	
	function slide(e) {
		var way = '';
		switch($(e).attr('id').substring(6)) {
			case 'left':
				if(position>0) {
					position--;
					way = '+';
				}
			break;
			case 'right':
				if(position+1<count) {
					position++;
					way = '-';
				}
			break;
		}
		
		$("#slides").animate({"marginLeft": way+"="+step}, "slow");
		arrowDisable();
	}
	
	$('a.arrow').click(function () {
		slide(this);
		return false;
	});
};