// swich image
function image(nr){
		for (i = 1; i < 7; i++)
	{
			if (nr == i)
			{
				document.getElementById("img" + i).style.display = "";
			}
			else
			{
				document.getElementById("img" + i).style.display = "none";
			}
 	}
}


//menu
function menu(nr){
	for (i = 1; i < 8; i++)
	{
			if (nr == i)
			{
				document.getElementById("sub" + i).style.display = "";
			}
			else
			{
					document.getElementById("sub" + i).style.display = "none";
			}
 	}

}

var crtMouseOnMenu=0;
function hidemenu(id){
	if(crtMouseOnMenu==id){
		console.log("clear menu "+crtMouseOnMenu);
		document.getElementById('sub'+id).style.display="none";
		crtMouseOnMenu=0;
	}
	else
		console.log("not on menu yet");
}
function setMouseOnMenu(id){
	console.log("setmouseonmenu "+id);
	crtMouseOnMenu=id;
}