我有一个 div 元素，其中包含我的所有内容，包括页面底部的视频。我的问题是，当我尝试向下滚动查看视频时，它只到达大约一半，并且拒绝进一步向下滚动。
<html>
<head>
<link rel="shortcut icon" href="Images/favicon.ico" />
<link rel="stylesheet" type="text/css" href="Style.css" media="screen" />
<title>Arthur</title>
<meta content="text/html" charset="windows-1251">
</head>
<Body background="Images/background2.jpg">
<A Href="main.html"><IMG class="imgborder" src="Images/button.png" align="left" height="50"></A>
<div id="wrapper" style="background-color:black; width:60%; margin-left: auto ; margin-right: auto ;">
<center><img width="60%" src="Images/logo2.png"></center>
<BR><BR>
<center><img class="imgborder" height="300" src="Images/muller.jpg"></center>
<Font size="5" color="crimson" face="Calibri">
<Center><P align="justify">... </P>
<P align="justify">...</P>
<P align="justify">...</P></Font></Center>
<Center><iframe width="640" height="360" src="http://www.youtube.com/embed/DooYpt9Gu1s" frameborder="5"
allowfullscreen></iframe></Center>
<Font size="5" color="crimson" face="Calibri"><P>Thomas Muller</P></font>
</div>
</body>
</html>
这是CSS：
@charset "utf-8";
/* CSS Document*/
/*This section is for links*/
a:link
{
font-weight:normal; color:crimson
}
a:visited
{
font-weight:normal; color:Crimson;
}
a:hover
{
font-weight:bold; color: Royalblue; font-variant:small-caps;
}
/*This section is for a paragraph section*/
p {
font-style:normal; font-size:18px;
}
blue {
color:crimson;
}
/*This section is for the image's black border.*/
.imgborder {
border-color: crimson; border:thick; border-style:outset;
}
.body
{
background-color: #0000FF;
}
html , body{height:100%;}
#wrapper {
margin: 0 auto;
width: 990px;
height:100%;
overflow:hidden;
position:relative;
}
#navigation {
margin: 0 auto;
width: 990px;
height: 55px;
background-color: #fff;
}
#bottomHalf {
margin: 0 auto;
width: 990px;
height: 100%;
background-color: #4d3c37;
}
div { /* set div to full width and height */
width: 100%;
height: 100%;
}
p {
margin-left:2cm; margin-right:2cm;
}