$(document).ready(function(){
   
   	//vars
   	var itemWidth = $("#slider-home .acontece ul li").css("width").replace("px", "");
   	var numItems = $("#slider-home .acontece ul li").length;
   	var listWidth = numItems*itemWidth;
   	var lastItemScroll = (numItems*itemWidth)-itemWidth;
   	var index = 1;
   
   	function animateList(pixels, direction) {
       	$("#slider-home .acontece ul").animate({"left" : ((direction) ? direction + "=" : "") + pixels + "px"});
   	}
   	
	function updatePicture(index) {
		if ($("#release-pic-" + index).val() != "none") {
			//$("#imagem-home img").attr("src", $("#release-pic-" + index).val());
			loadImage($("#release-pic-" + index).val());
		} else {
			//$("#imagem-home img").attr("src", $("#default-home-pic").val());
			loadImage($("#default-home-pic").val());
		}
	}
	
	//initialize
  	$("#slider-home .acontece ul").css({"width" : listWidth});
	updatePicture(index);
	
	$("#slider-home .arrow").click(function(){
	   
      	var option = $(this).attr("class");
       	
		if (option == "arrow right") {
           
         	if (index < numItems) {
               	animateList(itemWidth, "-");
               	index++;
           	} else {
               	animateList(0, "");
               	index = 1;
           	}
           
       	} else if (option == "arrow left") {
           
			if (index > 1) {
				animateList(itemWidth, "+");
				index--;
			} else {
				animateList(lastItemScroll, "-");
				index = numItems;
			}
           
		}
		
		updatePicture(index);
		
	});
   
});