js文字跑马灯

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>无缝滚动</title>
    <link rel="stylesheet" href="../../tab/mobileReset.css" />
    <style type="text/css">
        #box{width: 500px;height: 50px;background: blue;margin:100px auto;line-height: 50px;padding:0 15px;overflow: hidden}
        #box span{color: red;font-size: 14px;}
        #box p{color: yellow;font-size: 14px;white-space: nowrap;display: inline-block;}
        .boxCon{width: 10000px;}
    </style>
</head>
<body>
<div id="box">
    <div class="boxCon">
        <p id="begin"><span>通知:</span>offset():等同于jQuery中的offset方法，实现获取页面中任意一个元素距离body的偏移（包含左偏移和上偏移），不管当前元素的父级参照物是谁。</p>
        <p><span>通知:</span>offset():等同于jQuery中的offset方法，实现获取页面中任意一个元素距离body的偏移（包含左偏移和上偏移），不管当前元素的父级参照物是谁。</p>
    </div>
</div>
<script>
    var box = document.getElementById("box");
    var begin = document.getElementById("begin");
    var beginw = getCss(begin,"width");
    //无缝轮播代码其实很简单 哈哈
    var timer = window.setInterval(function(){
        box.scrollLeft++;
        var curLeft = box.scrollLeft;
        if(curLeft >= beginw){
            box.scrollLeft = 0;
        }
    },1);

    //获取元素具体样式方法
    function getCss(curEle,attr){
        var val = null,reg = null;
        if("getComputedStyle" in window){
            val = window.getComputedStyle(curEle,null)[attr];
        }else{
            if(attr === "opacity"){
                val = curEle.currentStyle["filter"];
                reg = /^alpha\(opacity=(\d+(?:\.\d+)?)\)$/i;
                val = reg.test(val)?reg.exec(val)[1]/100:1;
            }else{
                val = curEle.currentStyle[attr];
            }
        }
        reg = /^(-?\d+(\.\d+)?)(px|pt|rem|em)?$/i;
        return reg.test(val)?parseFloat(val):val;
    }
</script>
</body>
</html>
js文字跑马灯

推荐阅读更多精彩内容
