$.post('http://localhost/php/index.php',{w:width,h:height});//这里忽略了返回值

<html">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
    var width=window.screen.height;
    var height=window.screen.width;
    $.post('http://localhost/php/index.php',{w:width,h:height});//这里向你的统计文件里面传入相关的参数
});
</script>
</head>
<body>
这里是正文......
</body>
</html>