按钮驱动背景变化

脚本说明：
把如下代码加入<body>区域中:
<script language="JavaScript">
var COLOR = 999999
var woot = 0
function stoploop()
{
document.bgColor = '#336699';
clearTimeout(loopID);
}
function loopBackground()
{
if (COLOR > 0)
{
document.bgColor = '#' + COLOR
COLOR -= 111111
loopID = setTimeout("loopBackground()",1)
}
else
{
document.bgColor = '#336699'
woot += 10
COLOR = 999999
COLOR -= woot
loopID = setTimeout("loopBackground()",1)
}
}
</script>
<input type="button" value="Start bgColor WARP" onClick="loopBackground()"><br>
<input type="button" value=" Stop bgColor WARP" onClick="stoploop()">