R.nav = {
	init: function(){	
		var bod = document.body;
//are we on a gallery page?
		if (bod.id == "detail" && bod.className == "art") {
//add an event
//use your library method of choice, please
//we don't want to mess things up for other people
			document.onkeydown= R.nav.navigate ;
		} 
	},
	navigate : function(e) {
//normalize the event that comes in
//it's either the first argument to the function
//or it's window.event
		e = e || window.event;
		var obj;
//test to see what object initiated the event
		if(e.target) {
			obj=e.target;
		}
		else if (e.srcElement) {
			obj=e.srcElement;
		}
//was it a text node?
		if(obj.nodeType==3) {
			obj=obj.parentNode;
		}
//if it was an input or textarea, we want people to be able to
//use the arrow keys, clearly.
		if(obj.tagName == 'INPUT' || obj.tagName == 'TEXTAREA') {
			return;
		}
//get the numeric code of the key pressed
		if (e.keyCode) {
			code = e.keyCode;
		}
//ie doesn't understand event.which, apparently
		else if (e.which) {
			code = e.which;
		}
//test the code to see if it's a right or left arrow
//and navigate accordingly. The ids prev and next
//match the rel attributes, by the way
		if (code == 37){
			document.location.href=document.getElementById("prev").href;
		} else if (code ==39){
			document.location.href=document.getElementById("next").href; 
		}
	}
};