function next(dir,num_news){
	
	var options ={
		method: 'post',
		data: { 
			news_dir: dir,
			type_news: document.getElementById('type_news').value,
			ids: document.getElementById('ids').value,
			num_news_vis: num_news
			},
		async: true,
		evalScripts: true,
		update: $('box_riquadro'),
		url: 'include/get_news.php',
		onRequest: function(){
			if(dir=='a')				
				document.getElementById('news_page').value=parseInt(document.getElementById('news_page').value)+1;
			else
				document.getElementById('news_page').value=parseInt(document.getElementById('news_page').value)-1;
			document.getElementById('loading').style.display='';
		},

		onComplete: function() {				
						
				if(document.getElementById('news_page').value==0)
					document.getElementById('box_but1').style.display='none';
				else
					document.getElementById('box_but1').style.display='';

				if(document.getElementById('type_news').value=='p')
					if(document.getElementById('news_page').value>=parseInt(document.getElementById('max_pubbliche').value)-1)
						document.getElementById('box_but2').style.display='none';
					else
						document.getElementById('box_but2').style.display='';

				if(document.getElementById('type_news').value=='u')
					if(document.getElementById('news_page').value>=parseInt(document.getElementById('max_private').value)-1)
						document.getElementById('box_but2').style.display='none';
					else
						document.getElementById('box_but2').style.display='';
			
			setTimeout(function (){document.getElementById('loading').style.display='none';}, '500');
		},
		onFailure: function() {  
			//document.getElementById('loading').style.display='none';
			view_div_ko(1);
		}
		
	};
	
	var myRequest = new Request.HTML(options);
	
	myRequest.send();
}

function switch_news(type,num_news){
	type_now=document.getElementById('type_news').value; 
	
	if(type_now!=type){
		document.getElementById('news_page').value=-1;
		document.getElementById('type_news').value=type;
		document.getElementById('ids').value='';
		if(type=='u'){
			document.getElementById('box_tab2').className='box_tab2a';
			document.getElementById('box_tab1').className='box_tab1';
			}
		if(type=='p'){
			document.getElementById('box_tab1').className='box_tab1a';
			document.getElementById('box_tab2').className='box_tab2';
			}
		next('a',num_news);
		}
	
}