var
$ = function (id) {
  return document.getElementById(id);
},
//初始化操作
reset = function () {
  alertify.set({
    labels : {
      ok   : "确认",
      cancel : "取消"
    },
    delay : 5000,
    buttonReverse : false,
    buttonFocus  : "ok"
  });
};
//绑定
$("alert").onclick = function () {
   reset();
   alertify.alert("提示框");
   return false;
};
//绑定
$("confirm").onclick = function () {
   reset();
   alertify.confirm("确认框", function (e) {
     if (e) {
       alertify.success("点击确认");
     } else {
       alertify.error("点击取消");
     }
   });
   return false;
};
//绑定
$("prompt").onclick = function () {
  reset();
  alertify.prompt("提示输入框", function (e, str) {
    if (e) {
      alertify.success("点击确认，输入内容为: " + str);
    } else {
      alertify.error("点击取消");
    }
  }, "默认值");
  return false;
};

.alertify{
  width:350px;
  margin-left: -205px;
  border:2px solid #4ba9e6;
  background:#f3faff;
  border-radius:0;
}