Question

在网页中插入浮动窗口，js代码或css代码（易看易懂）

Answer 1

<div id=img1 style="Z-INDEX: 100; LEFT: 2px; WIDTH: 59px; POSITION: absolute; TOP: 43px; HEIGHT: 61px;
visibility: visible;"><a href="#" target="_blank"><img src="2.gif" width="80" height="80" border="0"></a></div>
<script language="javascript">
var xPos = 300;
var yPos = 200;
var step = 1;
var delay = 30;
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var pause = true;
var interval;
img1.style.top = yPos;
function changePos()
{
width = document.body.clientWidth;
height = document.body.clientHeight;
Hoffset = img1.offsetHeight;
Woffset = img1.offsetWidth;
img1.style.left = xPos + document.body.scrollLeft;
img1.style.top = yPos + document.body.scrollTop;
if (yon)
{yPos = yPos + step;}
else
{yPos = yPos - step;}
if (yPos < 0)
{yon = 1;yPos = 0;}
if (yPos >= (height - Hoffset))
{yon = 0;yPos = (height - Hoffset);}
if (xon)
{xPos = xPos + step;}
else
{xPos = xPos - step;}
if (xPos < 0)
{xon = 1;xPos = 0;}
if (xPos >= (width - Woffset))
{xon = 0;xPos = (width - Woffset); }
}

function start()
{
img1.visibility = "visible";
interval = setInterval('changePos()', delay);
}
function pause_resume()
{
if(pause)
{
clearInterval(interval);
pause = false;}
else
{
interval = setInterval('changePos()',delay);
pause = true;
}
}
start();
</script>

Answer 2

<div class="floatDiv" style="position: fixed; width: 200px; height: 200px; right: 10px; bottom: 20px; background-color: black; z-index: 1000;"></div>
这是一个不随页面滚动，固定浮动在窗口右下角的div，要让它随页面滚动的话就设置position:absolute;

Answer 3

css :
如 div { position:fixed;left:20px;top:100px; }
这个div就浮动在屏幕上了，水平方向便宜20px，竖直方向偏移100px;