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function verify() {
var jqueryObj = $("#username");
var username = jqueryObj.val();

//var url = "servlet/UserInfo?username=" + encodeURI(encodeURI(username));
var url = "servlet/UserInfo?username=" +username;

//עieû漼ͬһurlֻеһλصų́Ժʵľ

//ʱͿƭһieÿζԷʺ̨ˣ^_^

url = convertURL(url);
$.get(url, null, callback);
}

function callback(data) {
alert(data);
$("#userInfo").html(data);
}
function convertURL(url) {
var timestamp = new Date().valueOf();

if (url.indexOf("?") > 1) {
url = url + "&t=" + timestamp;
} else {
url = url + "?t=" + timestamp;
}
return url;
}