function show_block(block_num)
{
	$(".active").fadeOut('slow',function(){
		$(".active").css('display','none');
		$(".active").removeClass(this);
		$("#ikhwan_"+block_num).addClass('active');
		$(".active").css('display','').fadeIn('slow');
	});
}

var i = 1;
function alternate_main_ikhwan_news() {
	if(i>4) i=1;
	show_block(i);
	i++;
}

window.setInterval("alternate_main_ikhwan_news()", 5000);