html代码如下:
- <select id="teId" name="te_id" onchange="getArea()">
- <option value="1000">--请选择分类--</option>
- <option value="1">房产知识</option>
- <option value="8">房屋买卖</option>
- <option value="16">法律法规</option>
- <option value="24">银行贷款</option>
- <option value="31">房产类型</option>
- <option value="40">装修风水</option>
- <option value="47">房产经纪</option>
- <option value="52">其他问题</option>
- <option value="54">楼盘问答</option>
- </select>
- <span id="teTid" ></span>
- <span></span>
- <select id="wealth" name="wealth">
- <option value="">--请选择悬赏积分--</option>
- <option value="0">我要给0</option>
- <option value="5">我要给5</option>
- <option value="15">我要给15</option>
- <option value="30">我要给30</option>
- <option value="50">我要给50</option>
- </select>
ajax代码如下:
- // 创建ajax引擎
- function getXmlHttpObject() {
- var xmlHttpRequest;
- if (window.ActiveXObject) {
- xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
- } else {
- xmlHttpRequest = new XMLHttpRequest();
- }
- return xmlHttpRequest;
- }
- var myXmlHttpRequest = "";
- function getArea(){
- //alert(ID('teId').value);
- myXmlHttpRequest = getXmlHttpObject();
- // 怎样判断是否可以www.111cn.net
- if (myXmlHttpRequest) {
- // post 发送数据
- var url = "ajax_tiwen.php";
- var date = "teId=" + ID('teId').value;
- myXmlHttpRequest.open("post", url, true);
- myXmlHttpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=utf-8");
- myXmlHttpRequest.onreadystatechange = TiWen;
- myXmlHttpRequest.send(date);
- }
- }
php代码如下:
- $str = '';
- if(!$teamId)
- {
- $str .= '<select name="te_tid">';
- $str .= ' <option value="1000">--请选择分类--</option>';
- $str .= '</select>';
- echo $str;
- exit;
- }
- else
- {
- $str .= '<select id="teTid" name="te_tid">';
- $str .= ' <option value="1000">--请选择分类--</option>';
- foreach($teamId as $v)
- {
- $str .= '<option value="'.$v['id'].'">'.$v['tname'].'</option>';
- }
- $str .= '</select>';
- echo $str;
- }
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