<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script>
function all() {
var sj = new Date()
var h = sj.getHours()
var m = sj.getMinutes()
if(h > 10 && h < 20) {
document.getElementById('txt').innerHTML = "好了好了"
}
}
</script>
</head>
<body>
<input id="txt" type="text" />
<input type="button" value="现在该干什么？" onclick="all()" />
</body> </html>
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