代理模式

站长统计

var Count = (function() {
   var img = new Image();
   return function(param) {
     var str = 'http://www.count.com/a.git？';
     for (var i in param) {
       str = i + '=' param[i];
     }
     _img.src = str;
  }
})();

// 测试
Count ({num: 10});

JSONP

<script type = "text/JavaScript">
  function jsonpCallBack(res, req)  {    
    console.log(res, req);
  }   
</script>
<script type="text/JavaScript" src = "http://localhost/test/jsonp.php?callback=jsonp CallBack&data=getJsonPData"></script>
<?php    
  $data = $_GET["data"];    
  $callback = $_GET["callback"];    
  echo $callback."('success', '".$data."')";
?>