// Place your application-specific JavaScript functions and classes here
// This file is automatically included by javascript_include_tag :defaults

current_image = 1;

function set_picture_navi(img, zoom) {
	
	offset = Math.floor(img/5.01) * 5;
	for(var i = 1; i <= num_pictures; i++){
		if ((Math.floor(i/5.01) * 5) == offset) $('pl_'+i).show();
		else $('pl_'+i).hide();
	}
	//alert(offset);
	
	if (zoom == true){
		$('zoom_'+current_image).up().hide();
	  $('zoom_'+img).up().show();
	}else{
	  $('pi_'+current_image).hide();
	  $('pi_'+img).show();
  }
	$('pl_'+current_image).removeClassName('active');
	$('pl_'+img).addClassName('active');
	
	$('large-img_'+current_image).hide();
	$('large-img_'+img).show();
	
	if(img != 1){
	  $("picture-navi-first").update('<a href="#" onclick="set_picture_navi('+ (img-1) +','+zoom+');return false;"><img alt="Zurück" src="/images/webdesign/arr.gif" /></a>');
	}else{
		$("picture-navi-first").update('<img alt="Zurück" src="/images/webdesign/arr-left-grey.gif" />');
	}
	if(img == num_pictures) {
		$("picture-navi-last").update('<img alt="Weiter" src="/images/webdesign/arr-right-grey.gif" />');
	}else{
		$("picture-navi-last").update('<a href="#" onclick="set_picture_navi('+ (img+1) +','+zoom+');return false;"><img alt="Weiter" src="/images/webdesign/arr.gif" /></a>');
	}
	current_image = img;
}

function showNews(){
	$('news_content').show();
	$('nh2').hide();
	$('open').update('<a onclick="hideNews(); return false;" href="#"><img src="/images/webdesign/arr-down-green.png" alt="Schließen"/><br/>close</a>');
}
function hideNews(){
	$('news_content').hide();
	$('nh2').show();
	$('open').update('<a onclick="showNews(); return false;" href="#"><img src="/images/webdesign/arr-up-green.png" alt="Öffnen"/><br/>open</a>');
}