$(document).ready(function() { 
	$('.community_files_container').each(function(){
		if($(this).height() >120)
			$(this).parent().siblings('.top_arrow, .bottom_arrow').css({'display':'block'});
	});
	$('.top_arrow').click(up);
	$('.bottom_arrow').click(down);
	
	
	//js for communities overlay hover
	$('.communities .left .communities_links').hover(function(){
	    $(this).children('.communities_frame_overlay').fadeIn('fast');
	},function(){
	    $(this).children('.communities_frame_overlay').fadeOut('fast');
	});
});

function down(){
	var c=$(this).siblings('.community_files_wrapper').children('.community_files_container');
		c.animate({'top':Math.max(-(c.height()-120)-20,parseInt(c.css('top'))-120)+'px'});
}

function up(){	
	var c=$(this).siblings('.community_files_wrapper').children('.community_files_container');
		c.animate({'top':Math.min(0,parseInt(c.css('top'))+120)+'px'});
}