function changeImage(object, file)
{
	object.src = file;
}

function hideBook() 
{
	if (document.getElementById) { 
		// DOM3 = IE5, NS6
		document.getElementById('book').style.visibility = 'hidden';
	} else {
		if (document.layers) { 
			// Netscape 4
			document.hideShow.visibility = 'hidden';
		} else {
			// IE 4
			document.all.hideShow.style.visibility = 'hidden';
		}
	}
}

function showBook() 
{
	if (document.getElementById) { 
		// DOM3 = IE5, NS6
		document.getElementById('book').style.visibility = 'visible';
	} else {
		if (document.layers) { 
			// Netscape 4
			document.hideShow.visibility = 'visible';
		} else { 
			// IE 4
			document.all.hideShow.style.visibility = 'visible';
		}
	}
}