$(function(){

	$("#networks-button").css({
		opacity: 0.3
	});
	$("#contact-button").css({
		opacity: 0.3
	});

	$("#wrapper li.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)")) {
			
			$clicked.animate({
				opacity: 1,
				borderWidth: 5
			}, 600 );
			
			// each button div MUST have a "xx-button" and the target div must have an id "xx" 
			var idToLoad = $clicked.attr("id").split('-');
			
			//we search trough the content for the visible div and we fade it out
			$("#content").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 );
		
	});
});