/**
 *	Find all elements that have css class opaque and make them transparent
 *	@return not set
 *
 *	Used for semi-transparent small blocks when equivalent big block is opened
 **/
function  makeOpaque(id, fade){
	if ( typeof id == "undefined" ) id="";
	if ( typeof fade == "undefined" ) fade=0.33;
	$('.opaque'+id).fadeTo('normal', fade);
}