// Jump to anchor matching the key pressed (A-Z).
function keyJump(e) {
	var e = (e) ? e : ((event) ? event : null);
	if (e) self.location.hash = String.fromCharCode(e.keyCode);
}

// Provide a prompt that will not display if JS is disabled.
function keyPrompt() {
	document.write(" Press a letter to scroll alphabetically.");
}

// Check for key down event.
document.onkeydown = keyJump;