利用Ajax底層實現歌詞無刷搜尋

來源:互聯網
上載者:User
 如:

 

 

 

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
 <title>無標題文檔</title>
 </head>
 
 <body>
 <style type="text/css">
<!--
body {
background-color: #FFFFFF;
 font-size: 85%;
 font-family: Verdana;
 margin-top : 10px;
 margin-left : 10px;
}
a:link{color:#3737c8}
a:active {color: #f00;}
a:visited {color:#639;}
-->
</style>

<script language="javascript">
    var http_request = false;
    function send_request(url) {//初始化、指定處理函數、發送請求的函數
        http_request = false;
        //開始初始化XMLHttpRequest對象
        if(window.XMLHttpRequest) { //Mozilla 瀏覽器
            http_request = new XMLHttpRequest();
            if (http_request.overrideMimeType) {//設定MiME類別
                http_request.overrideMimeType('text/xml');
           }
        }
        else if (window.ActiveXObject) { // IE瀏覽器
            try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
               try {
                    http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
       }
        if (!http_request) { // 異常,建立對象執行個體失敗
            window.alert("不能建立XMLHttpRequest對象執行個體.");
            return false;
        }
       http_request.onreadystatechange = processRequest;
        // 確定發送請求的方式和URL以及是否同步執行下段代碼
       http_request.open("GET", url, true);
        http_request.send(null);
    }
   // 處理返回資訊的函數
    function processRequest() {
        if (http_request.readyState == 4) { // 判斷對象狀態
            if (http_request.status == 200) { // 資訊已經成功返回,開始處理資訊
                //alert(http_request.responseText);
                document.getElementById("result").innerHTML = http_request.responseText;
           } else { //頁面不正常
                alert("您所請求的頁面有異常。");
            }
        }
    }
    function dosearch() {
        var f = document.form1;
        var geci = f.geci.value;
        if(geci=="") {
            window.alert("請輸入你要查詢的歌詞");
            f.geci.focus();
           return false;
        }
        else {
            document.getElementById("result").innerHTML="正在查詢,請稍候";
            send_request('http://www.efish.cn/getgeci.aspx?m='+escape(geci));
        }
    }
   function submitForm() {
        if(window.event.keyCode==13) {
           dosearch();
        }
    }
</script>

<p></p><p></p>
<form id="form1" name="form1" method="post" action="">
<center><span style="font-size:18px; color:#FF0000">十萬歌詞線上免費查詢</span></center>
<p></p>
  請輸入歌曲名:
  <input name="geci" type="text" id="geci" value="東風破" size="60" height="30" maxlength="50" onKeyDown="submitForm()"  />
  <input type="button" name="search" value="查詢歌詞" onClick="dosearch()"><br />
  <span id="result"></span>
</form>
</body>
</html>

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