使用 Javascript 代碼,實現一個可移動的表徵圖在網頁上飄動,滑鼠放在上面的時候,表徵圖不動,移開後,表徵圖又開始移動.
javascript 代碼如下:
<script language='javascript'>
var xPos = 0;
var yPos = 0;
var step = 1;
var delay = 10;
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var xon = 0;
var interval;
var img = document.getElementById('img');
img.style.top = 0;
function changePos()
...{
width = document.body.clientWidth;
height = document.body.clientHeight;
Hoffset = img.offsetHeight;
Woffset = img.offsetWidth;
img.style.left = xPos + document.body.scrollLeft;
img.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() ...{
img.visibility = 'visible';
interval = setInterval('changePos()', delay);
}
function mystop()
...{
clearInterval(interval)
}
start()
</script>
頁面中,代碼如下:
<!-- FLASH浮動表徵圖廣代碼-->
<span id='img' style='position: absolute;' onmouseover='mystop()' onmouseout='start()'>
<object classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0'
width='140' height='160'>
<param name='movie' value='http://www.myhome.com.cn/swf/sample.swf'>
<param name='quality' value='high'>
<param name="wmode" value="transparent">
<!--這裡代碼可使Flash背景透明 -->
<embed src='http://www.myhome.com.cn/swf/sample.swf' quality='high' pluginspage='http://www.macromedia.com/go/getflashplayer'
type='application/x-shockwave-flash' width='306' height='141'> </embed>
</object>
</span>
原理:就是調用Macromedia的Flash組件,在Span中運行指定的SWF檔案(<param name='movie' value='http://www.myhome.com.cn/swf/sample.swf'>),Javascript指令碼用於控制Span的運動.