function hideslider() {
		
	document.getElementById('onthelevel').style.visibility = 'hidden';
	document.getElementById('otltab').style.visibility = 'hidden';	
	document.getElementById('wetroomtab').style.visibility = 'hidden';
	document.getElementById('lineartab').style.visibility = 'hidden';
	document.getElementById('leveltab').style.visibility = 'hidden';
	document.getElementById('screentab').style.visibility = 'hidden';
	document.getElementById('myytplayer').style.visibility = 'visible';
	document.getElementById('videos').style.visibility = 'visible';

	document.getElementById('otltab').style.background = 'none';
	document.getElementById('wetroomtab').style.background = 'none';
	document.getElementById('lineartab').style.background = 'none';
	document.getElementById('leveltab').style.background = 'none';
	document.getElementById('screentab').style.background = 'none';
	
	//alert('hello ben');
}

function showslider() {
	
	document.getElementById('onthelevel').style.visibility = 'visible';
	document.getElementById('otltab').style.visibility = 'visible';
	document.getElementById('wetroomtab').style.visibility = 'visible';
	document.getElementById('lineartab').style.visibility = 'visible';
	document.getElementById('leveltab').style.visibility = 'visible';
	document.getElementById('screentab').style.visibility = 'visible';
	document.getElementById('myytplayer').style.visibility = 'hidden';
	document.getElementById('videos').style.visibility = 'hidden';
	
	document.getElementById('otltab').style.background = 'white';
	document.getElementById('wetroomtab').style.background = 'white';
	document.getElementById('lineartab').style.background = 'white';
	document.getElementById('leveltab').style.background = 'white';
	document.getElementById('screentab').style.background = 'white';	
}