function showPart(elm, id){
	
	var d;
	
	var desc = $(id).immediateDescendants();
	
	for (var i = 0; i < desc.length; i ++){
		
		if (desc[i].tagName == 'UL')
			d = desc[i];
	}
	
	//alert(d);
	
	if (d.style.display == 'block'){
		d.style.display = 'none';
		elm.style.backgroundImage = 'url(' + ROOT + '/images/h2.png)';		
	}
	else{
		d.style.display = 'block';
		elm.style.backgroundImage = 'url(' + ROOT + '/images/h2b.png)';		
	}
}