document.onkeydown = NavigateThrough;
function NavigateThrough(event) {
	if(!document.getElementById) return;
	if(window.event) event = window.event;
	if(event.ctrlKey) {
		var link = null;
		var href = null;
		switch(event.keyCode ? event.keyCode : event.which ? event.which : null) {
			case 0x25:
				link = document.getElementById('NextLink');
				break;
			case 0x27:
				link = document.getElementById('PrevLink');
				break;
			case 0x26:
				link = document.getElementById('UpLink');
				break;
			case 0x28:
				link = document.getElementById('DownLink');
				break;
			case 0x24:
				href = '/';
				break;
		}
		if(link && link.href) document.location = link.href;
		if(href) document.location = href;
	}
}