用HTTP POST方式装入一个远程页面

返回值：XMLHttpRequest

参数：

• url (String): 装入页面的URL地址。
• params (Map): （可选）发送到服务端的键／值对参数。
• callback (Function): （可选） 当数据装入完成时执行的函数.

示例：

$.post("test.cgi");

示例：

$.post("test.cgi", { name: "John", time: "2pm" } );

示例：

$.post("test.cgi",
  function(data){
    alert("Data Loaded:   " + data);
   }
); 

示例：

$.post("test.cgi",
       { name: "John", time: "2pm" },
       function(data){
          alert("Data Loaded: " + data);
       } 
); 

$.post( url, params, callback )

Load a remote page using an HTTP POST request.

This is an easy way to send a simple POST request to a server without having to use the more complex $.ajax function. It allows a single callback function to be specified that will be executed when the request is complete (and only if the response has a successful response code). If you need to have both error and success callbacks, you may want to use $.ajax.

Return value: XMLHttpRequest
Parameters:

• url (String): The URL of the page to load.
• params (Map): (optional) Key/value pairs that will be sent to the server.
• callback (Function): (optional) A function to be executed whenever the data is loaded successfully.

Example:

 $.post("test.cgi");  

Example:

 $.post("test.cgi", { name: "John", time: "2pm" } );  

 $.post("test.cgi",
        function(data){
          alert("Data Loaded: " + data);
        }
 );  

Example:

 $.post("test.cgi",
     { name: "John", time: "2pm" },
     function(data){
       alert("Data Loaded: " + data);
     }   
 );