📄 30.htm
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<html>
<head>
<title>升降文字</title>
<script language="javascript">
<!--
i = 0;
top1 = 0;
top2 = 100;
left = 100;
control = true;
function moveText(){
txt.style.left = left;
txt.style.top = i;
if(control && top2 > i){
i+=2;
}else{
control = false;
}
if(!control && i > top1){
i-=2;
}else{
control = true;
}
setTimeout("moveText()",1);
}
//-->
</script>
</head>
<body onLoad="moveText()">
<div id="txt" style="position:absolute;width=98">升降文字</div>
</body>
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