// JavaScript Document

//	
// wait for window load
Event.observe(window, 'load', function(){
	var topRNStart = $('RightNavFix').viewportOffset();
	// Now observe scroll
	Event.observe(window, 'scroll', function() {
		var distanceFromTop = $('sideNav').viewportOffset()[1];
		var distanceFromBottom = $('pageFooter').viewportOffset()[1] - $('RightNavFix').getHeight();
		//stick to top
		if(distanceFromTop > 0){
			$('RightNavFix').setStyle({
				position: 'relative',
				marginTop: 'auto'
			});
		//stick to bottom
		}else if(distanceFromBottom < 0){
			$('RightNavFix').setStyle({
				position: 'relative',
				marginTop: ($('leftPadding').getHeight() - $('form').getHeight() - $('RightNavFix').getHeight()) + 'px'
			});
		//float in the middle
		}else{
			$('RightNavFix').setStyle({
				position: 'fixed',
				width: '296px',
				backgroundColor: '#acc3d5',
				top: '0px',
				marginTop: 'auto'
			});
		}
	}); // End scroll observer
}); // End load observer