怎么把tel 后面跟的号码 换成变量 例如把 b 写到tel 后面
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
</head>
<body>
<a href="tel:1580384732">1580384732</a>
</body>
<script type="text/javascript" src="js/jquery-2.2.4.min.js"></script>
<script type="text/javascript">
var b =1580384732
</script>
</html>
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