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#2
liujh132017-08-30 14:47
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<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script type="text/javascript" >
function Myclik(){
alert(Math.PI);
}
</script>
<input type="button" value="点击" onclick="Myclik">
</body>
</html>
为什么点击没反应,很苦恼