function do_verify() {
	var AppNumber = document.myform.appNumber.value;
    xmlHttp = createXMLHttpRequest();
    var url = "/AppOfferList.php?AppNumber="+AppNumber;
    xmlHttp.onreadystatechange = handleReadyStateChange;
    xmlHttp.open("GET", url, true);　//传递数据的方法同样有GET和POST两种,但是当方法为POST时下面的一句话就必须写
    xmlHttp.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
    xmlHttp.send(null);
}

function handleReadyStateChange() {
    if (xmlHttp.readyState == 4) {
        if (xmlHttp.status == 200) {
			    document.getElementById('AppNum').innerHTML = xmlHttp.responseText;
				document.getElementById("AppNum").style.display = "block";
        } else {
            alert(xmlHttp.status);
        }
    }
}