function hideall(){

	document.getElementById("infomenu").style.visibility = 'hidden';
	document.getElementById("offertesmenu").style.visibility = 'hidden';
	document.getElementById("helpmenu").style.visibility = 'hidden';
	

}


function showinfo(tijd) {
	hideall();
	document.getElementById("infomenu").style.visibility = 'visible';	
	infot = setTimeout("hideinfo()", tijd);
}

function hideinfo() {
	document.getElementById("infomenu").style.visibility = 'hidden';
}



function showoffertes(tijd) {
	hideall();
	document.getElementById("offertesmenu").style.visibility = 'visible';	
	offertest = setTimeout("hideoffertes()", tijd);
}

function hideoffertes() {
	document.getElementById("offertesmenu").style.visibility = 'hidden';
}



function showhelp(tijd) {
	hideall();
	document.getElementById("helpmenu").style.visibility = 'visible';	
	helpt = setTimeout("hidehelp()", tijd);
}

function hidehelp() {
	document.getElementById("helpmenu").style.visibility = 'hidden';
}