ajax使用POST传递参数

下边是我找到的一个例子http://jeremy-lee.blog.sohu.com/63843765.html

post.html:

<script type="text/javascript" language="javascript">

   var http_request = false;

   function makePOSTRequest(url, parameters) {

      http_request = false;

      if (window.XMLHttpRequest) { // Mozilla, Safari,...

         http_request = new XMLHttpRequest();

         if (http_request.overrideMimeType) {

         	// set type accordingly to anticipated content type

            //http_request.overrideMimeType('text/xml');

            http_request.overrideMimeType('text/html');

         }

      } else if (window.ActiveXObject) { // IE

         try {

            http_request = new ActiveXObject("Msxml2.XMLHTTP");

         } catch (e) {

            try {

               http_request = new ActiveXObject<
("Microsoft.XMLHTTP");

            } catch (e) {}

         }

      }

      if (!http_request) {

         alert('Cannot create XMLHTTP instance');

         return false;

      }

      

      http_request.onreadystatechange = alertContents;

      http_request.open('POST', url, true);

      http_request.setRequestHeader("Content-type", 
"application/x-www-form-urlencoded");

      http_request.setRequestHeader("Content-length", 
parameters.length);

      http_request.setRequestHeader("Connection", 
"close");

      http_request.send(parameters);

   }


   function alertContents() {

      if (http_request.readyState == 4) {

         if (http_request.status == 200) {

            //alert(http_request.responseText);

            result = http_request.responseText;

            document.getElementById('myspan').innerHTML = result;            

         } else {

            alert('There was a problem with the request.');

         }

      }

   }

   

   function get(obj) {

      var poststr = "mytextarea1=" + encodeURI( 
document.getElementById("mytextarea1").value ) +

                    "&mytextarea2=" + encodeURI( 
document.getElementById("mytextarea2").value );

      makePOSTRequest('post.php', poststr);

   }

</script>





<form action="javascript:get(document.getElementById
('myform'));" name="myform" id="myform">

<textarea id="mytextarea1">my test

1

2

3

</textarea>

<textarea id="mytextarea2">my test2

4

5

6</textarea>

<br>

<input type="button" name="button" 
value="Submit" 

   onclick="javascript:get(this.parentNode);">

<input type="submit" name="button" 
value="Normal Submit Button">

</form>



<br><br>

Server-Response:<br>

<hr>

<span name="myspan" id="myspan"></span>
<hr>

post.php

<?
print_r(
下边是我找到的一个例子
post.html:

<script type="text/javascript" language="javascript">

   var http_request = false;

   function makePOSTRequest(url, parameters) {

      http_request = false;

      if (window.XMLHttpRequest) { // Mozilla, Safari,...

         http_request = new XMLHttpRequest();

         if (http_request.overrideMimeType) {

         	// set type accordingly to anticipated content type

            //http_request.overrideMimeType('text/xml');

            http_request.overrideMimeType('text/html');

         }

      } else if (window.ActiveXObject) { // IE

         try {

            http_request = new ActiveXObject("Msxml2.XMLHTTP");

         } catch (e) {

            try {

               http_request = new ActiveXObject<
("Microsoft.XMLHTTP");

            } catch (e) {}

         }

      }

      if (!http_request) {

         alert('Cannot create XMLHTTP instance');

         return false;

      }

      

      http_request.onreadystatechange = alertContents;

      http_request.open('POST', url, true);

      http_request.setRequestHeader("Content-type", 
"application/x-www-form-urlencoded");

      http_request.setRequestHeader("Content-length", 
parameters.length);

      http_request.setRequestHeader("Connection", 
"close");

      http_request.send(parameters);

   }


   function alertContents() {

      if (http_request.readyState == 4) {

         if (http_request.status == 200) {

            //alert(http_request.responseText);

            result = http_request.responseText;

            document.getElementById('myspan').innerHTML = result;            

         } else {

            alert('There was a problem with the request.');

         }

      }

   }

   

   function get(obj) {

      var poststr = "mytextarea1=" + encodeURI( 
document.getElementById("mytextarea1").value ) +

                    "&mytextarea2=" + encodeURI( 
document.getElementById("mytextarea2").value );

      makePOSTRequest('post.php', poststr);

   }

</script>





<form action="javascript:get(document.getElementById
('myform'));" name="myform" id="myform">

<textarea id="mytextarea1">my test

1

2

3

</textarea>

<textarea id="mytextarea2">my test2

4

5

6</textarea>

<br>

<input type="button" name="button" 
value="Submit" 

   onclick="javascript:get(this.parentNode);">

<input type="submit" name="button" 
value="Normal Submit Button">

</form>



<br><br>

Server-Response:<br>

<hr>

<span name="myspan" id="myspan"></span>
<hr>




post.php

___FCKpd___1


Update from visitor "ar200r" - thank you very much 

if we use "&" character it wont work...

but if we use escape();



var poststr = "mytextarea1=" + escape(encodeURI(

document.getElementById("mytextarea1").value )) 
+"&mytextarea2=" +

escape(encodeURI( document.getElementById("mytextarea2
").value ));



and next in php u use urldecode , it will work good.






POST);

?>

Update from visitor "ar200r" - thank you very much

___FCKpd___2