JS浮动图片

最新推荐文章于 2018-09-03 10:47:00 发布

Bingo_Me

最新推荐文章于 2018-09-03 10:47:00 发布

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CC 4.0 BY-SA版权

文章标签： delay function javascript border table 文档

本文链接：https://blog.youkuaiyun.com/Bingo_Me/article/details/2819283

本文通过一个具体的实例展示了如何使用HTML与JavaScript进行交互，包括如何操作DOM元素的可见性及位置，实现了一个简单的浮动窗口效果。此示例还涉及了基本的鼠标事件处理。

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档hidden</title>
</head>

<body>
<DIV id=img1 style="Z-INDEX: 100; LEFT: 2px; WIDTH: 59px; POSITION: absolute; TOP: 43px; HEIGHT: 61px;
visibility: visible;"><table width="10" border="0" cellspacing="0" cellpadding="0">
<tr>
    <td height="18" align="center"><a href="#" onClick="javascript:document.getElementById('img1').style.visibility='hidden';">关闭</a></td>
</tr>
<tr>
    <td><img src="images/2008.gif" width="111" height="127"></td>
</tr>
</table>
</DIV>
<SCRIPT>
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>
</body>
</html>