/////////////////////////////
// image popup

function ImagePopup(sUrl) {
	var sMsg = 'Want the Sounds?\n\nChordWizard Music Theory 3.0 is the full\nversion of the How Music Works tutorials.\n\nIt can be installed on your computer for easy reference,\nand includes all the sounds, text searching,\nbookmarking and many printing options.\n\nWould you like more details?\n';
	if (confirm(sMsg))
		self.location.href = sUrl;
}