<!-- http://www.knowsky.com -->
<!-- bbs http://bbs.knowsky.com -->
<!--要完成此效果需要两个步骤
第一步：把如下代码加入到<body>区域中-->
<script>
<!--
var imageheight=280
var imagewidth=560
var cliptop
var clipbottom
var clipleft
var clipright
var clippoints
var tempo=100
var stepx=0
var stepy=0
var timer
function setValues() {
if (document.all) {
document.all.image.style.posLeft=0
document.all.image.style.posTop=0
document.all.imagecontent.style.posLeft=0
document.all.imagecontent.style.posTop=0
moveimage()
}
}
function moveimage() {
if (stepx<=imagewidth || stepy<=imageheight) {
stepx=stepx+12
stepy=stepy+6
image.innerHTML="<span style='width:"+stepx+"px; height:"+stepy+"px;background-color:000000;filter:alpha(opacity=0,finishopacity=100,style=2'></span>"
cliptop=0
clipbottom=stepy
clipleft=0
clipright=stepx
clippoints="rect("+cliptop+" "+clipright+" "+clipbottom+" "+clipleft+")"
document.all.imagecontent.style.clip=clippoints
timer=setTimeout("moveimage()",tempo)
}
else{
clearTimeout(timer)
timer=setTimeout("moveimage2()",tempo)
}
}
function moveimage2() {
if (stepx>=0 || stepy>=0) {
stepx=stepx-12
stepy=stepy-6
image.innerHTML="<span style='width:"+stepx+"px; height:"+stepy+"px;background-color:000000;filter:alpha(opacity=0,finishopacity=100,style=2'></span>"
cliptop=0
clipbottom=stepy
clipleft=0
clipright=stepx
clippoints="rect("+cliptop+" "+clipright+" "+clipbottom+" "+clipleft+")"
document.all.imagecontent.style.clip=clippoints
timer=setTimeout("moveimage2()",tempo)
}
else{
stepx=0
stepy=0
clearTimeout(timer)
timer=setTimeout("moveimage()",tempo)
}
}
-->
</script>
<DIV id=imagecontent style="LEFT: -5000px; POSITION: absolute; TOP: -5000px"><IMG height=421 src="http://www.knowsky.com/images/12090.gif" width=735></DIV>
<DIV id=image style="POSITION: absolute; TOP: -50px"></DIV>
<!--第二步：把“onload=setValues()”加在<body>标记里
例如：-->
<body onload=setValues()>
