function ExitProg()
{
// Ask for confirmation
 var where_to= confirm("Stai uscendo dal GULP-DVD. Clicca su OK per uscire.");
 if (where_to== true)
 {
   window.close();
 }
}
function styleChange(){
	//controllo browser
	var ss = document.styleSheets;
	var chStyle = document.getElementById("chStyle");
	
	if(ss[1].disabled){
		ss[1].disabled = false;
		ss[0].disabled = true;
		chStyle.innerHTML = "Usa stile chiaro";
	}
	else if(ss[0].disabled)
	{
		ss[1].disabled = true;
		ss[0].disabled = false;
		chStyle.innerHTML = "Usa stile scuro";
	}
	
}