var objectSlide = null;
var objectCover = null;

function showSlide(slideName) {
	objectCover=document.getElementById('cover');
	objectSlide=document.getElementById(slideName);

	objectSlide.style.display = 'block';

	objectCover.style.display = 'block';
}


function hideSlide() {
	objectSlide.style.display = 'none';	
	objectCover.style.display = 'none';
}