function newXMLHttpRequest() {
	var http_request = false;
	if(window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
	}
	else if (window.ActiveXObject) {
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) {
		window.alert("Error!"); //不能创建XMLHttpRequest对象实例.
		return false;
	}
	return http_request;
}

function selcry(cid,pid)
{
	var http_request = newXMLHttpRequest();
	var url = "../includes/selcry.asp?cid=" + cid +"&pid=" + pid;
	http_request.onreadystatechange = processRequest;
	http_request.open("GET", url, true);
	http_request.send(null);

// 处理返回信息的函数
	function processRequest() {
		if (http_request.readyState == 4 || http_request.readyState=="complete") { // 判断对象状态
			if (http_request.status == 200) { // 信息已经成功返回，开始处理信息
				document.getElementById("price-box").innerHTML=http_request.responseText;
				document.getElementById("price-options-box").innerHTML=http_request.responseText;
			} else { //页面不正常
				alert("Error!"); //所请求的页面有异常
			}
		}
	}
}