滑动窗口

<script>
var test
var b
function fade(){
test = setInterval("if(parseInt(document.all.u.height)<200){document.all.u.height=parseInt(document.all.u.height)+5}else{clearInterval(test)}",10)
}

function reset(){
test = setInterval("if(parseInt(document.all.u.height)>1){document.all.u.height=parseInt(document.all.u.height)-5}else{clearInterval(test)}",10)
}
</script>
<iframe width=640 height=0  border=0 id=u src="http://deimy.512j.com"></iframe>
<a href="javascript:" onClick="fade()">打开</a>
<a href="javascript:" onClick="reset()">复位</a>