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 ('prev_link');
				break;
			case 0x27:
				link = document.getElementById ('next_link');
				break;
			case 0x24:
				href = '/';
				break;
            case 0x23:
				href = '/about/contacts.html';
				break;
            case 103:
				window.alert('Привет от разработчиков! Если вы это увидели - пишите support@yarland.ru');
    			break;
		}

		if (link && link.href) document.location = link.href;
		if (href) document.location = href;
	}			
}