function resizeContentDIV () {
	
	var space_header = 220;
	var space_footer = 58;
	
	var new_height = $("body").getHeight() - space_header - space_footer;
	
	if ( new_height < 270 ) new_height = 270;
	
	$('content_spacer').setStyle( { height:(new_height)+'px' } );
	
}
document.observe("dom:loaded", function() { resizeContentDIV(); });
Event.observe(window, "resize", function() { resizeContentDIV(); });