jQuery文字横向滚动效果的实现代码

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<div id="noticeList" style="position:absolute; top:0; height:20px;"><span>jQuery文字横向滚动</span><span>jQuery制作文字横向滚动</span><span>www.jb51.net</span></div> 

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$.fn.textScroll=function(){ 

var speed=60,flag=null,tt,that=$(this),child=that.children(); 

var p_w=that.width(), w=child.width(); 

child.css({left:p_w}); 

var t=(w+p_w)/speed * 1000; 

function play(m){ 

var tm= m==undefined ? t : m; 

child.animate({left:-w},tm,"linear",function(){ 

$(this).css("left",p_w); 

play(); 

}); 

} 

child.on({ 

mouseenter:function(){ 

var l=$(this).position().left; 

$(this).stop(); 

tt=(-(-w-l)/speed)*1000; 

}, 

mouseleave:function(){ 

play(tt); 

tt=undefined; 

} 

}); 

play(); 

}

$.fn.textScroll=functioon(){ 

var p = $(this), 

c = p.children(), 

speed=3000;// 值越大，速度越小 

var cw = c.width(),pw=p.width(); 

var t = (cw / 100) * speed; 

var f = null, t1 = 0; 

function ani(tm) { 

counttime(); 

c.animate({ left: -cw }, tm, "linear", function () { 

c.css({ left: pw }); 

clearInterval(f); 

t1 = 0; 

t=((cw+pw)/100)*speed; 

ani(t); 

}); 

} 

function counttime() { 

f = setInterval(function () { 

t1 += 10; 

}, 10); 

} 

p.on({ 

mouseenter: function () { 

c.stop(false, false); 

clearInterval(f); 

console.log(t1); 

}, 

mouseleave: function () { 

ani(t - t1); 

console.log(t1); 

} 

}); 

ani(t); 

}