function changelang(lang){
	var currentpage=location.href;
	var index=currentpage.indexOf("?lang=")+6;
	var currentlang=currentpage.substring(index,index+2);
	if(currentlang!=lang.toUpperCase()){
		var rechargepage=currentpage.replace(currentlang,lang.toUpperCase());
		location.href=rechargepage;
	}	
}

function checklang(){
	var currentpage=location.href;
	if(currentpage.indexOf("?lang=")==-1){
		if(window.navigator.language=='it'){
		 location.href=currentpage+"?lang=IT";		
		}else{
		 location.href=currentpage+"?lang=EN";
		}
	}
}

function getLang(){
	var currentpage=location.href;
	var index=currentpage.indexOf("?lang=")+6;
	var currentlang=currentpage.substring(index,index+2);
	return currentlang.toUpperCase();
}