function change_menu_over_img(id){
	document.getElementById('menu_img_'+id).src="img/menu_"+id+"_on.gif";
}

function change_menu_out_img(id){
	document.getElementById('menu_img_'+id).src="img/menu_"+id+"_off.gif";
}

function show_blog_article(article){
	if (document.getElementById(article).className=="blog_content")
	{
		document.getElementById(article).className="blog_content_hidden";
	}
	else{
		document.getElementById(article).className="blog_content";
	}
	/*
	articles_content = document.getElementsByClassName('blog_content');
	for(i = 0; i < articles_content.length; i++) {
		articles_content[i].className="blog_content_hidden";
	}
	document.getElementById(article).className="blog_content";
	*/
}

function change_menu_on(id){
	document.getElementById('menu_text_'+id).src="/img/menu_0"+id+"_on.jpg";
	document.getElementById('menu_img_'+id).src="/img/menu_0"+id+"_img_on.jpg";
}

function change_menu_off(id){
	document.getElementById('menu_text_'+id).src="/img/menu_0"+id+"_off.jpg";
	document.getElementById('menu_img_'+id).src="/img/menu_0"+id+"_img_off.jpg";
}