<script type="text/java script" language="java script" src="weather.js"></script>
<A HREF="http://www.webjx.com"> 
<img src="logo.gif" BORDER="0"> 
</A> 
<br />
文章地址：用AJAX技術(shù)來實現(xiàn)天氣預報功能 
<A HREF=http://www.webjx.com/show.php?id=265</A> 
<h3>天氣預報 
<span id="loadifo"></span> 
</h3> 
<h5>城市：
<select onChange="loadurl(this.value)" class="select">
        <option value="CHXX0138" selected="selected">武漢</option>
        <option value="CHXX0097">南昌</option>
        <option value="CHXX0502">海口</option>
        <option value="CHXX0008">北京</option>
        <option value="CHXX0116">上海</option>
        <option value="CHXX0037">廣州</option>
        <option value="CHXX0259">銀川</option>
        <option value="CHXX0165">鄭州</option>
        <option value="CHXX0013">長沙</option>
        <option value="CHXX0390">杭州</option>
        <option value="CHXX0049">香港</option>
        <option value="CHXX0146">西安</option>
        <option value="CHXX0016">成都</option>
        <option value="CHXX0110">青島</option>
        <option value="CHXX0039">貴陽</option>
        <option value="CHXX0064">濟南</option>
        <option value="CHXX0448">合肥</option>
        <option value="CHXX0031">福州</option>
        <option value="CHXX0099">南京</option>
        <option value="ITXX0042">米蘭</option>
</select>
</h5>
<div id="prolist"></div>

// java script Document
function btnSty(objId,objStyle)
{
        document.getElementById(objId).style.display = objStyle
}
//提示窗口控制
function ifodis(){
        btnSty(’loadifo’,’none’);
}
function settime(a){
        setTimeout(a,1000);
}
function loadtime(){
        loadifo.innerHTML += "."
}
//XML數(shù)據(jù)綁定
var xmldoc = false;
function loadurl(n){
//生成隨機數(shù)，同時限制刷新次數(shù)
        var now=new Date();
        var Num=now.valueOf();
//定義往址參數(shù)
        url = "weather.asp?n="+n+"&id="+Num;
//定義為異步傳輸模式
        xmldoc = false;
//Mozill,Safari等瀏覽器時需要創(chuàng)建的XMLHttp類
        if(window.XMLHttpRequest){
                xmldoc = new XMLHttpRequest();
                if(xmldoc.overrideMimeType){
                                xmldoc.overrideMimeType(’text/xml’);
                }
        }
//IE瀏覽器時創(chuàng)建的XMLHttp類
        else if(window.ActiveXObject){
                try{
                        xmldoc = new ActiveXObject("Msxml3.XMLHTTP");
                }
                catch(e){
                        try{
                                xmldoc = new ActiveXObject("Msxml2.XMLHTTP");
                        }
                        catch(e){
                                try{
                                        xmldoc = new ActiveXObject("Microsoft.XMLHTTP");
                                }
                                catch(e){}
                        }
                }
        }
//不能創(chuàng)建XMLHTTP類時返回
        if(! xmldoc){
                return false;
        }
//調(diào)用CheckState函數(shù)
        xmldoc.onreadystatechange = CheckState;
        xmldoc.open(’GET’,url,true);
        xmldoc.send(null);
}
//狀態(tài)檢測
function CheckState(){
        btnSty(’loadifo’,’’)
//收到完整的服務(wù)器響應
        if(xmldoc.readyState == 1){
                loadifo.innerHTML = "連接服務(wù)器"
                }
        else if(xmldoc.readyState == 2){
                loadifo.innerHTML = "開始加載數(shù)據(jù)"
                }
        else if(xmldoc.readyState == 3){
                loadifo.innerHTML = "正在加載數(shù)據(jù)"
                settime(loadtime)
                }
        else if(xmldoc.readyState == 4){
//HTTP服務(wù)器響應值成功
                if(xmldoc.status == 200){
//將服務(wù)器返回的字符串寫到頁面中ID為showdiv的區(qū)域
     loadifo.innerHTML = "加載完成"
                 var response = xmldoc.responseText;
                 settime(ifodis)
                 prolist.innerHTML = response;
                }
                else{
                        loadifo.innerHTML = "錯誤"+xmldoc.statusText+"請重新選擇";
                }
        }
}
if (top.location != self.location)top.location=self.location;