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        <option value="">--ÇëÑ¡Ôñ--</option>
        <option value="1">ºþÄÏÊ¡</option>
        <option value="2">ºþ±±Ê¡</option>
    </select>
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    <select id="sel2">
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    var xmlHttp;
    //´´½¨XMLHttpRequest¶ÔÏó
    function createXMLHttpRequest() {
       if(window.ActiveXObject) {
           xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
       } else if (window.XMLHttpRequest) {
           xmlHttp = new XMLHttpReuqest();
       }
    }
    //Ñ¡ÔñÏÂÁÐÁбíÖеÄÖµ
    function choose(obj) {
       var province = obj.value;
       createXMLHttpRequest();
       xmlHttp.onreadystatechange = process;
       xmlHttp.open("GET", "SelProvince?province=" + province);
       xmlHttp.send(null);
    }
   
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    function process() {
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       if(xmlHttp.readyState == 4) { //Èç¹ûÏìÓ¦Íê³É
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