function handleKeys(e) {

	if(document.activeElement.tagName == 'TEXTAREA' || document.activeElement.tagName == 'INPUT') {
		return;
	}
	
	var key;
	
	if(!e) {
		var e = window.event;
	}
	
	if(e.keyCode) {
		key = e.keyCode;
	} else if(e.which) {
		key = e.which;
	}
	
	if(key == 37) {
		if(document.getElementById('prevPhotoLink')) {
			window.location = document.getElementById('prevPhotoLink').href;
		}
	}	
	
	if(key == 39) {
		if(document.getElementById('nextPhotoLink')) {
			window.location = document.getElementById('nextPhotoLink').href;
		}
	}
}

document.onkeydown = handleKeys;