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  • js实现网页页面回到顶部

    <script language="javascript">
    $(function(){
        var $backToTopTxt = "返回顶部", $backToTopEle = $('<div class="backToTop"></div>').appendTo($("body"))
        .text($backToTopTxt).attr("title", $backToTopTxt).click(function() {
        $("html, body").animate({ scrollTop: 0 }, 120);
    }), $backToTopFun = function() {
        var st = $(document).scrollTop(), winh = $(window).height();
        (st > 0)? $backToTopEle.show(): $backToTopEle.hide();
        //IE6下的定位
        if (!window.XMLHttpRequest) {
        $backToTopEle.css("top", st + winh - 166);
        }
    };
    $(window).bind("scroll", $backToTopFun);
    $(function() { $backToTopFun(); });
    });
    </script>

    css样式,完成在页面右下边栏竖向显示“返回顶部”4个字

    <style>
    /*返回顶部*/
    .backToTop {display: none; width: 18px; line-height: 1.2; padding: 5px 0; background-color: #000; color: #fff; font-size: 12px; text-align: center; position: fixed; _position: absolute; right: 10px; bottom: 100px; _bottom: "auto"; cursor: pointer; opacity: .6; filter: Alpha(opacity=60);}
    </style>
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  • 原文地址:https://www.cnblogs.com/kennyhr/p/3472481.html
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