function handleArrow(id, col, hasChildren, show)
{	
	var imageTag = document.getElementById(id);
	
	if (show == true) {
		if (hasChildren == true) {
			imageTag.src = '../images/p_black_down.gif';
		}
		else {
			if (col == 'black') imageTag.src = '../images/p_black.gif';
			if (col == 'red')   imageTag.src = '../images/p_red.gif';	
		}		
	}
	else if (show == false) {
		imageTag.src = '../images/spacer.gif';
	}
}