var bSlider = true;
function slider(id) {
	if(bSlider) {
		if(active_slider == id) {
			active_slider = id;
		} else if(active_slider != '') {
			//alert(id);
			Effect.SlideUp(active_slider, { 
				beforeStart : function() { 
					bSlider = false; 
				}, 
				duration: 0.4,
				afterFinish : function() { 
					bSlider = true; 
					$(id+'_button').className = '';
				}
			});
			
			Effect.SlideDown(id, { 
				beforeStart : function() { 
					bSlider = false;
				}, 
				duration: 0.4,
				delay: 0.4,
				afterFinish : function() { 
					bSlider = true;
					$(id+'_button').className = 'active';
					active_slider = id;
				}
			});
			
		}
		else
		{
			Effect.SlideDown(id, { 
				beforeStart : function() { 
					bSlider = false;
				},
				duration: 0.4,
				afterFinish : function() { 
					bSlider = true;
					$(id+'_button').className = 'active';
					active_slider = id;
				}
			});
			
		}
	}
}