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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Language" content="utf-8" />
<meta name="robots" content="all" />
<meta name="author" content="Tencent-ISRD" />
<meta name="Copyright" content="Tencent" />
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<style type="text/css" media="screen">
ul li{
    list-style-type:none;
    padding-left:15px;
    background: url(file:///C|/Users/huinawang/Desktop/1.png) no-repeat 4px 12px;
    line-height:30px;
    }

</style>
<title>column-rule-style</title>
</head>
<body>

            <div class="hideNav-fixed-top">
                <ul>
                    <li><a href="#">很多</a></li>
                    <li><a href="#">很多</a></li>
                    <li><a href="#">很多</a></li>
                    <li><a href="#">很多</a></li>
                    <li><a href="#">很多</a></li>
                </ul>
            </div>
            <div style="height:1000px"></div>

</body>
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$(document).ready(function(){
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        var scrollTop=$(window).scrollTop();
        console.log(scrollTop);
        if(scrollTop>100){
            $(".hideNav-fixed-top").css("display","block");
            }else{
                $(".hideNav-fixed-top").css("display","none");
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