/*-----------------------------------------------------------------------------------------/
* JQuery PlugIn - Slide Show(or, Switch Tab)
* JQuery滑动切换插件 ver 1.2.0
*
* defaultIndex 	- 默认选中的标签索引，从0开始
* titOnClassName	- 标签选中时的样式
* titCell			- 自定义标题标签，支持选择符
* mainCell			- 自定义标题标签，支持选择符
* delayTime		- 延迟触发时间. 当这个时间小于切换动画效果时间时, 动画将被禁用
* interTime		- 自动切换时间. 当这个时间大于0时, 标签将定时自动切换
* trigger			- 滑动触发方式. 默认为click, 可选择mouseover
* effect			- 切换动画. 默认不使用动画. 目前仅提供fade(淡出), slide(向下展开)两种
* omitLinks		- 是否忽略带链接标签，默认为否
* debug			- 调试模式. 默认关闭

/*----------------------------------------------------------------------------------------*/

jQuery.fn.switchTab = function(settings) {
    settings = jQuery.extend({//可配置参数
        defaultIndex: 0,
        titOnClassName: "on",
        titCell: "dt span",
        mainCell: "dd",
        delayTime: 250,
        interTime: 0,
        trigger: "click",
        effect: "",
        omitLinks: false,
        debug: "",
		sInterval:null // 增加内置参数，用于控制鼠标悬停时停止自动切换效果。
    },
	settings,
	{//插件信息
	    version: 100
	});

    this.each(function() {
        var st;
        var curTagIndex = -1;
        var obj = jQuery(this);
        if (settings.omitLinks && settings.titCell.substr(settings.titCell.length - 1, 1) == "a") {
            settings.titCell = settings.titCell + "[href^='#']";
        }
        var oTit = obj.find(settings.titCell);
        var oMain = obj.find(settings.mainCell);
        var cellCount = oTit.length; //可切换个数
        var ShowSTCon = function(oi) {
            if (oi != curTagIndex) {
                if (curTagIndex < 0) obj.find(settings.titCell + "." + settings.titOnClassName).removeClass(settings.titOnClassName);
                else oTit.eq(curTagIndex).removeClass(settings.titOnClassName);
                oMain.hide();
                obj.find(settings.titCell + ":eq(" + oi + ")").addClass(settings.titOnClassName);
                if (settings.delayTime < 250 && settings.effect != "") settings.effect = "";
                if (settings.effect == "fade") {
                    obj.find(settings.mainCell + ":eq(" + oi + ")").fadeIn({ queue: false, duration: 250 });
                } else if (settings.effect == "slide") {
                    obj.find(settings.mainCell + ":eq(" + oi + ")").slideDown({ queue: false, duration: 250 });
                } else {
                    obj.find(settings.mainCell + ":eq(" + oi + ")").show();
                }
                curTagIndex = oi;
            }
        };

        var ShowNext = function() {
            oTit.eq(curTagIndex).removeClass(settings.titOnClassName);
            oMain.hide();
            if (++curTagIndex >= cellCount) curTagIndex = 0;
            oTit.eq(curTagIndex).addClass(settings.titOnClassName);
			
			if (settings.effect == "fade") {
				obj.find(settings.mainCell + ":eq(" + curTagIndex + ")").fadeIn({ queue: false, duration: 250 });
			}else{
				oMain.eq(curTagIndex).show();
			}
            //ShowSTCon(curTagIndex);
        };

        //根据defaultIndex初始化
        ShowSTCon(settings.defaultIndex);

        //定时切换
		var interFun = function(){
			if (settings.interTime > 0) {
				   settings.sInterval = setInterval(function() {
					ShowNext();
				}, settings.interTime);
			}
		};

		interFun();

        //处理交互事件
		obj.hover(   
			function(){ if(settings.sInterval!=null){clearInterval(settings.sInterval);}  },
			function(){ interFun(); }
		);

        oTit.each(function(i, ele) {
            if (settings.trigger == "click") {
                jQuery(ele).click(function() {
                    ShowSTCon(i);
                    return false; //若有链接而选择了click模式, 链接不起作用
                });
            } else if (settings.delayTime > 0) {
                jQuery(ele).hover(function() {
                    st = setTimeout(function() {//延时触发
                        ShowSTCon(i);
                        st = null;
                    }, settings.delayTime);
                }, function() {
                    if (st != null) clearTimeout(st);
                });
            } else {
                jQuery(ele).mouseover(function() {
                    ShowSTCon(i);
                });
            }
        });
    });
    if (settings.debug != "") alert(settings[settings.debug]);
    return this;
};