jQuery + css 公告从左往右滚动

$(function() {
// 公告滚动
$(".notice-content").textScroll();
});

/**
* 从右往左滚动文字
* @returns {undefined}
*/
$.fn.textScroll = function() {
// 滚动步长(步长越大速度越快)
var step_len = 60;
var this_obj = $(this);
var child = this_obj.children();
var this_width = this_obj.width();
var child_width = child.width();
var continue_speed = undefined;// 暂停后恢复动画速度
// 初始文字位置
child.css({
left: this_width
});

// 初始动画速度speed
var init_speed = (child_width + this_width) / step_len * 1000;

// 滚动动画
function scroll_run(continue_speed) {
var speed = (continue_speed == undefined ? init_speed : continue_speed);
child.animate({
left: -child_width
}, speed, "linear", function() {
$(this).css({
left: this_width
});
scroll_run();
});
}

// 鼠标动作
child.on({
mouseenter: function() {
var current_left = $(this).position().left;
$(this).stop();
continue_speed = (-(-child_width - current_left) / step_len) * 1000;
},
mouseleave: function() {
scroll_run(continue_speed);
continue_speed = undefined;
}
});

// 启动滚动
scroll_run();
};

<div class="notice-title">公告：</div>
<div class="notice-content">
<div class="notice-text"><span>公告内容</span></div>
</div>

.notice-title {
color: #fff;
}

.notice-content {
position: relative;
width: 800px;
height: 30px;
white-space: nowrap;
overflow: hidden;
float: left;
margin-left: 55px;
margin-top: -30px;

/*背景透明度
background-color: #fff;
filter:alpha(opacity=10);
-moz-opacity:0.5;
-khtml-opacity: 0.5;
opacity: 0.5;
*/
}
.notice-text {
color: red;
font-size: 14px;
position: absolute;
}