Ajax当中中文处理的方法

2.中文处理：

例 2.1
<html>
<head>
<title></title>
<script language="JavaScript">
    var xmlrequest;

    function createXMLHttpRequest() {
         if(window.ActiveXObject){//ie
                alert("we are using microsoft ActiveXObject");
                xmlrequest = new ActiveXObject("Microsoft.XMLHTTP");
            }
            else if(window.XMLHttpRequest){
                xmlrequest = new XMLHttpRequest();
            }
    }
    createXMLHttpRequest();
    function postSend(value) {
        var uri = "servlet21";
        xmlrequest.open("POST", uri, true);
/*through experiment, we find that we must use the
following statement, otherwise post can not work.
form-urlencoded是Ajax第一次编码,公认的Ajax是用的UTF-8编
码的，所以第二次编码是用的UTF-8编的码。*/
        xmlrequest.setRequestHeader("Content-Type",
                "application/x-www-form-urlencoded");
        xmlrequest.onreadystatechange = processResponse;
        xmlrequest.send("test=" + value);
    }

    function getSend(value) {
        var uri = "servlet21?test="+value ;
/*见上面POST所示，Ajax发送数据时,是经过两次编码的,
所以这里我也要两次编码。 */
        uri=encodeURI(uri);
        uri=encodeURI(uri);
        xmlrequest.open("GET", uri, true);
        xmlrequest.onreadystatechange = processResponse;
        xmlrequest.send(null);
    }

    function processResponse() {
        if (xmlrequest.readyState == 4 && (xmlrequest.status == 200)) {
            var tex = xmlrequest.responseText;
//            alert(tex);
            document.getElementById("results").innerHTML = tex;
            return;

        }
    }