$(document).ready(function(){
		
			$("#one-button").css({
				opacity: 1.0
			});
			$("#two-button").css({
				opacity: 0.5
			});
			
			$("#three-button").css({
				opacity: 0.5
			});
			$("#four-button").css({
				opacity: 0.5
			});
			$("#wrapper div.button").click(function(){
				
				$clicked = $(this);
				
				// if the button is not already "transformed" AND is not animated
				if($clicked.css("opacity") != "1" && $clicked.is(":not(animated)"))
				{
					//we animate it (remember the reference for optimisation ?)
					$clicked.animate({
						opacity: 1,
						//borderWidth: 5
					}, 600 );
					
					//we "calculate" the id to shown (each button div MUST have a "xx-button" and the target div must have an id "xx" )
					//yet again the reference
					var idToLoad = $clicked.attr("id").split('-');
					//we search trough the content for the visible div and we fade it out
					$("#info").find("div:visible").fadeOut("fast", function(){
						//once the fade out is completed, we start to fade in the right div
						$(this).parent().find("#"+idToLoad[0]).fadeIn();
					})
				}
				
				//we reset the other buttons to default style
				$clicked.siblings(".button").animate({
					opacity: 0.5,
					borderWidth: 1
				}, 600 );
				
			});
		});