//*********首页焦点图切换
//images文件夹中放置 focus1.png, focus2.png ...
var focus_count = 4; //焦点图总数
var crt_focus = 1; //当前/起始编号
var change_time = 5000;  //切换时间间隔
var timer;

$(document).ready(function(){
	initTimer();
	$("#index_focus_control a").click(function(){
		change_focus($(this).attr("id"));
	});
});

function change_focus(num){
    if(crt_focus != num){
        setTimeout(function(){
            $("#index_focus").css("backgroundImage", "url(images/focus"+num+".jpg)");
        },0);
        //$("#index_focus").animate({opacity: '0'},100).animate({opacity: '1'},100);
        $("#index_focus_control a").removeClass("crt");
        $("#index_focus_control a#" + num).addClass("crt");

        //添加链接
        if (num == 1) {
//            $(".index_focus_link").attr("href", "/event/20110221.html").show();
        }
        else {
            $(".index_focus_link").attr("href", "").hide();
        }
    }
    crt_focus = Number(num);
    initTimer();
}

function initTimer(){
    clearInterval(timer);
    timer = setInterval(function(){
        var temp = 0;
        crt_focus < focus_count ? temp = crt_focus + 1 : temp = 1;
        change_focus(temp);
    }, change_time);
}