function aggiorna(page){
	//alert("larghezza: "+document.body.clientWidth+"<br>altezza: "+document.body.clientHeight);
	window.location = page;
}

function navCheck(maxPage){
	var livello = document.getElementById('current_page').innerHTML;
	var navBack = document.getElementById('nav_back');
	var navFoward = document.getElementById('nav_foward')
	
	if(maxPage == 1){
		navBack.style.visibility = 'hidden';
		navFoward.style.visibility = 'hidden';
	} else {
		if(livello == 1){
			navBack.style.visibility = 'hidden';
			navFoward.style.visibility = 'visible';
		} else if(livello == maxPage) {
			if(maxPage != 1){
				navBack.style.visibility = 'visible';
			}
			navFoward.style.visibility = 'hidden';
		} else {
			navBack.style.visibility = 'visible';
			navFoward.style.visibility = 'visible';
		}
		
		document.getElementById('nav_foward').href = '#item'+(++livello);
		document.getElementById('nav_back').href = '#item'+(livello-2);
	}
}

function paginazione(tipo){
	if(tipo == 1){
		document.getElementById('current_page').innerHTML = ++document.getElementById('current_page').innerHTML;
	} else {
		document.getElementById('current_page').innerHTML = --document.getElementById('current_page').innerHTML;
	}
	//navCheck();
}

function gallery(idDiv, pic){
	
	changePic(pic);
	
	var divs = document.getElementsByTagName('div');
	

	for ( i = 0; i < divs.length; i ++ ) {

		if ( divs.item(i).getAttribute('id') == idDiv ) {
			//alert(divs.item(i).getAttribute('id'));
			divs.item(i).className = "gallery_on";
		} else {
			stringLev = new String(divs.item(i).getAttribute('id'));
			//stringLev = lev.substr(0,7);
			
			if(stringLev.substr(0,7) == "gallery"){
				divs.item(i).className = "gallery_off";
			}
		}
		
	}
	
}

function changePic(pic){
	//alert(pic);
	//document.getElementsByName('visual').src = pic;
	//document["visual"].src = pic;
	$('#loading_image').html('<div class="loading"></div>');
	$('#loading_image').load('./page/process/visual.php?pic='+pic);
}

function formToString(form){
	var str			= "";
	var elements	= form.elements;
	for(var i=0;i<elements.length;i++){
		var el = form.elements[i]; 
		if(el.tagName=="INPUT"){
			if(el.type.toUpperCase()=="RADIO"){
				if(!el.checked)
					continue;
			}
		}
		if(!el.name)
			continue;
		if(str!="")
			str += "&";
		str += el.name + "=" + form.elements[i].value;
	}
	return str;
}