// JavaScript Document
function show_arrow($cell_id)
{
	
	var conference_rw = document.getElementById('conference_arrow');
	var training_rw = document.getElementById('training_arrow');

	
	if ( $cell_id == 'conference') {
		conference_rw.style.background = 'url("arrow.png") no-repeat 50% 50%';
		training_rw.style.background = 'url("blank_arrow.png")';
	} else	if ($cell_id == 'training') {
		training_rw.style.background = 'url("arrow.png") no-repeat 50% 50%';
		conference_rw.style.background = 'url("blank_arrow.png")';
	}
	else {
		training_rw.style.background = 'url("blank_arrow.png")';
		conference_rw.style.background = 'url("blank_arrow.png")';
	}
	
}