function switch_tab(tab_object){
	var tab_object = tab_object;
	var content_object = document.getElementById(tab_object.id+"-cnt");
	var parent_object = document.getElementById(tab_object.parentNode.id);
    var tabs = parent_object.getElementsByTagName("li");
	for (var i = 0; i < tabs.length; i++) {
		var thisTab = tabs[i];
		if (thisTab.id) {
			var other_content_object = document.getElementById(thisTab.id+"-cnt");
			other_content_object.style.display = 'none';
			var other_tab_object = document.getElementById(thisTab.id);
    			other_tab_object.className = "tabs";	
		}
	}	
	tab_object.className = "tabs sel";	
	content_object.style.display = 'block';
}

function ApriChiudiVerde(obj_img) {
    var obj_img = obj_img;
    var text_object = document.getElementById(obj_img.id+"-txt");
    if (document.getElementById(obj_img.id+"-txt").style.display!="block") {
        document.getElementById(obj_img.id+"-txt").style.display="block";
        document.getElementById(obj_img.id).src="img/ico-meno-g.png";
	}
	else {
        document.getElementById(obj_img.id+"-txt").style.display="none";
        document.getElementById(obj_img.id).src="img/ico-piu-g.png";
    }
}

function ApriChiudiViola(obj_img) {
    var obj_img = obj_img;
    var text_object = document.getElementById(obj_img.id+"-txt");
    if (document.getElementById(obj_img.id+"-txt").style.display!="block") {
        document.getElementById(obj_img.id+"-txt").style.display="block";
        document.getElementById(obj_img.id).src="img/ico-meno.png";
	}
	else {
        document.getElementById(obj_img.id+"-txt").style.display="none";
        document.getElementById(obj_img.id).src="img/ico-piu.png";
    }
}

function ApriChiudi() {
    if (document.getElementById("subH1").style.display!="block") {
        document.getElementById("subH1-intro").style.display="none";
        document.getElementById("subH1").style.display="block";
	}
	else {
        document.getElementById("subH1").style.display="none";
        document.getElementById("subH1-intro").style.display="block";
    }
}

function startList() {
	if (document.all&&document.getElementById) {
		navRoot = document.getElementById("menulist");
		for (i=0; i<navRoot.childNodes.length; i++) {
			node = navRoot.childNodes[i];
			if (node.nodeName=="LI") {
				node.onmouseover=function() {
					this.className+=" over";
				}
				node.onmouseout=function() {
					this.className=this.className.replace(" over", "");
				}
			}
		}			
	}
}
function clearUser(user, defaultValue) {
   if (user.value == defaultValue)
   {
      user.value = '';
      user.style.color= '#333333';
   }
}
function clearPwd(pwd, defaultValue) {
   if (pwd.value == defaultValue)
   {
      pwd.value = '';
      pwd.style.color= '#333333';
   }
}
function clearQtext(Qtext, defaultValue) {
   if (Qtext.value == defaultValue)
   {
      Qtext.value = '';
      Qtext.style.color= '#333333';
   }
}
// funzione generica per pulire i campi //
function clearInput(inp_text, defaultValue) {
   var inp_text = inp_text;
   if (inp_text.value == defaultValue)
   {
      inp_text.value = '';
      inp_text.style.color= '#333333';
   }
}