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  • 仿照淘宝首页做的一个高度伪对齐demo

    功能就是当右边高度没有左边高的情况下做的一些处理,由于本人技术有限,不兼容所有浏览器,

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
    <style>
    body { width:1000px; margin:0 auto; }
    .top { height:200px; background-color:#6FF;}
    .left { width:500px; float:left; background:#f4f4f4; height:3000px;}
    .right { width:500px; float:right; height:1500px; background-color:#CCF; }
    .rightPostion { bottom:0px; top:auto; left:50%;}
    .bot { clear:both; background-color:#cc3; min-height:150px;}
    .cont {
        overflow: auto; position:relative; 
    }
    </style>
    </head>
    
    <body>
    <div class="top">此处显示  class "top" 的内容</div>
    <div class="cont">
      <div class="left" id="left">此处显示  class "left" 的内容</div>
      <div class="right rightPostion" id="right">
        <p>此处显示  class "right" 的内容</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>3</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>5</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>ss</p>
        <p>&nbsp;</p>
        <p>d</p>
        <p>s</p>
        <p>d</p>
        <p>s</p>
        <p>笔筒圣诞节</p>
      </div>
    </div>
    <div class="bot">此处显示  class "bot" 的内容</div>
    <script>
    var r= document.getElementById("right");
    var l = document.getElementById("left");
    document.onkeydown = keydown ;
    window.onmousewheel = document.onmousewheel = wheel; 
    var screenH =  window.screen.availHeight;
    var maxH = l.offsetHeight+200-screenH;
    var positionH =  r.offsetHeight+200-screenH    ;
    function wheel(){
    
    if(document.body.scrollTop>=positionH&&document.body.scrollTop<maxH){
        r.style.position = "fixed"
        }
        else if (document.body.scrollTop<positionH)  {r.style.position = "static" }
        else {
            r.style.position = "absolute"
        }    
        
    
    }
    function keydown (e){
        e = e || e.event ;
        var code = e.keyCode||e.which||e.charCode;
        console.log(code);
        if(code ==38 || code ==40){
            wheel()
            
            }
        }
    
    </script>
    </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/xiaotian747/p/3643034.html
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