ctrl_navigation = function (event) {
	if(window.event)
		event = window.event
	var target = event.target ? event.target.tagName : event.srcElement ? event.srcElement.tagName : ''
	if(event.ctrlKey) {
		var link = null
		if(37 == event.keyCode)
			link = document.getElementById('prevlink')
		if(39 == event.keyCode)
			link = document.getElementById('nextlink')
		if(link && link.href)
			location.href = link.href
	}
}

if(document.addEventListener) {
	document.addEventListener('keyup', ctrl_navigation, false)
} else if(document.attachEvent) {
	document.attachEvent('onkeydown', ctrl_navigation)
}