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<select id="sel1" onchange="return choose(this);">
<option value="">--ÇëÑ¡Ôñ--</option>
<option value="1">ºþÄÏÊ¡</option>
<option value="2">ºþ±±Ê¡</option>
</select>
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<select id="sel2">
<option value="">--ÇëÑ¡Ôñ--</option>
</select>
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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);
}
//ÓÃÀ´´¦Àí״̬¸Ä±äµÄº¯Êý
function process() {
//¶¨ÒåÒ»¸ö±äÁ¿ÓÃÓÚ´æ·Å´Ó·þÎñÆ÷·µ»ØµÄÏìÓ¦½á¹û
var result;
if(xmlHttp.readyState == 4) { //Èç¹ûÏìÓ¦Íê³É
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var xmlHttp;
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