function show_hide(div) {
	var temp = $(div);
	if(temp.style.display == 'none'){
		temp.style.display = 'block';
		return false;
	}else{
		temp.style.display = 'none';
		return false;
	}
}

function show_hide_animated(div){
	var temp = $(div);
	if(temp.style.display == 'none'){
		Effect.BlindDown(div);
		return false;
	}else{
		Effect.BlindUp(div);
		return false;
	}
}

function fade_out(div_id){
	Effect.Fade(div_id, {from: 1, to: 0.2});
}

function fade_in(div_id){
	Effect.Fade(div_id, {from: 0, to: 0.3});
}


/** EFFECTS **/
/**
 * hide the current item show the next item
 */
function next_news_item(current, limit) {
	//$('news_' + current).style.display = 'none';
	new Effect.Fade('news_' + current, { duration: 0.3 });
	
	if(current == limit) {
		//$('news_0').style.display = 'block';
		new Effect.Appear('news_0', { duration: 0.3, queue:'end' });
	}
	else {
		//$('news_' + (current + 1)).style.display = 'block';
		new Effect.Appear('news_' + (current + 1), { duration: 0.3, queue:'end' });
	}
}
/**
 * hide the current item show the previous item
 */
function previous_news_item(current, limit) {
	//$('news_' + current).style.display = 'none';
	new Effect.Fade('news_' + current, { duration: 0.3 });
	
	if(current == 0) {
		//$('news_' + limit).style.display = 'block';
		new Effect.Appear('news_' + limit, { duration: 0.3, queue:'end' });
	}
	else {
		//$('news_' + (current - 1)).style.display = 'block';
		new Effect.Appear('news_' + (current - 1), { duration: 0.3, queue:'end' });
	}
}