var start = 1;
var height = 278;
var isPlay = true;
function movePic(position) {
	//var topPosition = position * height;
	//$("#player_bg").animate({top: -topPosition+"px"})
	$("#player_bg ul li").hide();
	$("#player_bg ul li").eq(position).fadeIn(500);
	$("#ifocus_btn ul li").removeClass().addClass("normal");
	$("#ifocus_btn ul li").eq(position).removeClass().addClass("current");

	start = position;
}
function autoPlay() {
	if (isPlay != true) {
		return;
	}

	if (start > 3) {
		start = 0;
	}

	movePic(start);
	start++;
}
$(function(){
	$("#ifocus_btn ul li").hover(
		function(){
			isPlay = false;
			var position = $("#ifocus_btn ul li").index(this);
			movePic(position);
		},
		function(){
			isPlay = true;
			start++;
		}
	)
})
setInterval("autoPlay()", 4000);