document.onkeydown = PerformNavigation;

function PerformNavigation (event)
	{
	if (!document.getElementById) return;
	if (window.event) event = window.event;
	if (event.ctrlKey)
		{
		var goto = null;
		switch (event.keyCode ? event.keyCode : event.which ? event.which : null)
			{
			case 0x25:
				goto = document.getElementById ('PrevLink');
			break;
			case 0x27:
				goto = document.getElementById ('NextLink');
			break;
			}
		if (goto && goto.href) document.location = goto.href;
		}
	}