JS_定时器setInterval 笔记
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN">
<head>
<title>JS_定时器setInterval</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<input type="button" value="5"/>
</body>
<script type="text/javascript">
function iner(){
var ipt=document.getElementsByTagName('input')[0];
if ((ipt.value=ipt.value-1)==0) {
clearInterval(aa);
}
}
var aa=setInterval('iner()',1000);
</script>
</html>
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