$(document).ready(function(){
	heronum = 1;
	$('#hero_slide .hero_img').hide();
	$('#hero_slide .img'+heronum+'').fadeIn(2000).addClass('current');
	herointervalID = setInterval(heroNext,5000);
});
function heroNext(){
	if(heronum < 4){
		heronum++;
	}else{
		heronum = 1;
	}
	$('#hero_slide .current').fadeOut(100).removeClass('current');
	$('#hero_slide .img'+heronum+'').fadeIn(2000).addClass('current');
}