jQuery插件--图片文字向上向左循环滚动

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;(function($){
$.fn.extend({
"jScroll":function(o){
o =$.extend({
auto: 3000, //延迟时间（毫秒）
speed: 800, //单次滚动时长（毫秒）
vertical: false, //是否向上滚动(默认向左)
scroll: 1 //每次滚动的元素数量
},o);
var running = false, sizeCss = o.vertical ? "height" : "width", ulSize = 0;
varscrollTimer, scrollLen, itemSize, animCss, i;
var div = $(this), ul = div.find("ul"), li = ul.children("li");

div.css({overflow: "hidden"});
ul.css({margin: "0", padding: "0", display: "inline-block"});
li.css({"list-style-type": "none", float: o.vertical ? "none" : "left"});

//获取LI元素总宽(高)
for(i=0; i<=li.size()-1; i++){
itemSize = o.vertical ?li.eq(i).outerHeight() : li.eq(i).outerWidth();
ulSize+=itemSize;
}
var divSize = o.vertical ? div.height() : div.width(); //容器宽(高)
ul.css(sizeCss, (ulSize*2)+"px");
if(ulSize > divSize) running = true; //UL的宽(高)大于容的器宽(高)时才滚动
div.hover(function(){
clearInterval(scrollTimer);
},function(){
if(running){
scrollTimer = setInterval(function(){
scrollLen = 0;
itemSize = 0;
li = ul.children("li");
for(i=0; i<=o.scroll-1; i++){
itemSize = o.vertical ?li.eq(i).outerHeight() : li.eq(i).outerWidth();
scrollLen+=itemSize;
}
animCss = o.vertical ? {marginTop:-scrollLen +"px"} : {marginLeft:-scrollLen +"px"};
ul.animate(animCss, o.speed, function(){
ul.css(o.vertical ? "margin-top" : "margin-left", "0");
li.slice(0,o.scroll).appendTo(ul); //将前面的元素移至末尾
})
}, parseInt(o.auto+o.speed));
}
}).trigger("mouseleave"); //DOM加载完毕后自动执行hover(fn1, fn2)的fn2
}
});
})(jQuery);