function ArrowKey(event)
{
	var navLink = null;
	
	if (event.keyCode == 37)
	{
		var navLink = document.getElementById('prevLink');
    }
	else if(event.keyCode == 38)
	{
		var navLink = document.getElementById('upLink');
	}
    else if(event.keyCode == 39)
    {
        var navLink = document.getElementById('nextLink');
    }
	else if(event.keyCode == 40)
	{
		var navLink = document.getElementById('downLink');
	}
	else if (event.keyCode == 68)
	{
		var navLink = document.getElementById('playLink');	
	}
	
	if (navLink != null)
	{
		navLink.onclick();
		//document.location.href = navLink.href;
	}
}	
function addEvent(obj, evType, fn, useCapture){
	if (obj.addEventListener){
		obj.addEventListener(evType, fn, useCapture);
		return true;
	} else if (obj.attachEvent){
		var r = obj.attachEvent("on"+evType, fn);
		return r;
	} else {
		alert("Handler could not be attached");
	}
} 
addEvent(document, "keydown", ArrowKey, false);