<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div style="height:100px;"></div>
<div style="height:200px;"></div>
<div style="height:220px;"></div>
<div style="height:130px;"></div>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script>
(function($){
$.fn.maxHeight = function(){
var max = 0;
this.each(function(){
max = Math.max(max,$(this).height())
})
return max;
}
})(jQuery)
console.log( $("div").maxHeight() )
</script>
</body>
</html>
