$.fn.iFadeSlide = function(iSet){
	/*
	 * iSet可选参数说明:
	 * iSet.field==>幻灯区域内的图片集
	 * iSet.ico==>按钮钩子
	 * iSet.high==>按钮高亮样式
	 * iSet.interval==>图片切换时间
	 * iSet.leaveTime==>不触发鼠标划入事件的最大时间值
	 * iSet.fadeInTime==>淡入时间
	 * iSet.fadeOutTime==>淡出时间
	 * 调用方式$(document).iFadeSlide({field:'...',ico:'...',...})
	 */
    iSet = $.extend({high:'high',interval:3000,leaveTime:150,fadeOutTime:400,
fadeInTime:400},iSet);
    var imgField = $(iSet.field || '#slide>img');
    var icoField = $(iSet.ico || '#ico');
	var curIndex = 0;
    var slideInterval = iSet.interval || 3000;
    var hoverTime = iSet.leaveTime || 150;
    var fadeOutTime = iSet.fadeOutTime || 400;
    var fadeInTime = iSet.fadeInTime || 400;
    var icos=null, fastHoverFun = null, autoSlideFun = null, hasIcoHighCls = null, 
changeFun = null,max=null;;
    var icoHtml = '<ul>';
	max=imgField.size();
	//按图片传入对应的按钮
    imgField.each(function(i){
        icoHtml += '<li>' + (i + 1) + '</li>';
    });
    icoHtml += '</ul>';
    icoField.append(icoHtml);
	//淡入淡出函数
    changeFun = function(n){
        imgField.filter(':visible').fadeOut(fadeOutTime, function(){
            imgField.eq(n).fadeIn(fadeInTime)
            icos.eq(n).addClass(iSet.high).siblings().removeClass(iSet.high);
        });
    }
    icos = icoField.find('ul>li');
	//为第一个按键初始化高亮
    icos.first().addClass(iSet.high);
	//按钮鼠标划入划出事件
    icos.hover(function(){
        clearInterval(autoSlideFun);
        curIndex = icos.index(this);
        hasIcoHighName = $(this).hasClass(iSet.high);
		//setTimeout避免用户快速(无意识性划过)划过时触发事件
        fastHoverFun = setTimeout(function(){
			//鼠标划入当前图片按钮时不闪烁
            if (!hasIcoHighName) {
                changeFun(curIndex);
            }
        }, hoverTime);
    }, function(){
        clearTimeout(fastHoverFun);
		//自动切换
        autoSlideFun = setInterval(function(){
            curIndex++;
            changeFun(curIndex);
            if (curIndex ==max ) {
				changeFun(0);
                curIndex = 0;
            }
        }, slideInterval)
    }).eq(0).trigger('mouseleave');
	
    //当鼠标划入图片区域时停止切换
    imgField.hover(function(){
        curIndex = imgField.index(this);
        clearInterval(autoSlideFun);
    }, function(){
        icos.eq(curIndex).trigger('mouseleave');
    });
}
 
$(function(){
	//SAMPLE-A
	$(document).iFadeSlide();
	
	//SAMPLE-B
	$(document).iFadeSlide({
		field: $('div#slide_b a'),
		ico:$('div.ico_b'),
        high: 'high_b',
        interval: 2000
	});
	
	//SAMPLE-C
	$(document).iFadeSlide({
		field: $('div#slide_c img'),
		ico: $('div.ico_c'),
		fadeOutTime:100,
		fadeInTime: 200
	});
});