var request = false;
try {
 request = new XMLHttpRequest();
} catch (trymicrosoft) {
 try {
 request = new ActiveXObject("Msxml2.XMLHTTP");
 } catch (othermicrosoft) {
 try {
 request = new ActiveXObject("Microsoft.XMLHTTP");
 } catch (failed) {
 request = false;
 }
 }
}
if (!request)alert("Error initializing XMLHttpRequest!");
//获取信息
function getInfo() {
 var url = "room.asp?h="+AjaxForm.HotelId.value+"&db="+AjaxForm.date1.value+"&de="+AjaxForm.date2.value;
 request.open("GET", url, true);
 request.onreadystatechange = updatePage;
 request.send(null);
}
//更新页面
function updatePage() {
 if (request.readyState == 4) 
 {
 if (request.status == 200) {
 var response = request.responseText;
 document.getElementById("roomprice").innerHTML = response;
 } else
 alert(request.status + "错误");
 } else
 document.getElementById("roomprice").innerHTML = "价格加载中……";
}