interval.js

var MarketingCommunication = function(elem){
				i = 0;

				setInterval(function(){

					var current = i;
					var before = (current - 1) == -1 ? (elem.length - 1) : (current - 1);
					var after = current + 1;


					elemBefore = elem.eq(before);
					elemCurrent = elem.eq(current);
					elemAfter = elem.eq(after);

					elemBefore.removeClass("in").addClass("out");
					elemCurrent.removeClass("out");
					

						if(current == 0){
							setTimeout(function(){
								elemCurrent.addClass("in");
							}, 1500);
						} else if(current == 1) {
							setTimeout(function(){
								elemCurrent.addClass("in");
							}, 2000);
						}

					setTimeout(function(){
						if(elem.eq(current).hasClass('marketing')){
							$("#simple-d-utilisation span.communication").removeClass("bold");
							$("#simple-d-utilisation span.marketing").addClass("bold");
						} else {
							$("#simple-d-utilisation span.marketing").removeClass("bold");
							$("#simple-d-utilisation span.communication").addClass("bold");
						}
					}, 1500);

					i++;
					if(i < elem.length){
					} else {
						i = 0;
					}
				}, 12000);