直接上代码，代码中有注释

<%@LANGUAGE="JAVASCRIPT" CODEPAGE="65001"%>
<%
var numVisits;
var myDate = new Date();
myDate.setDate(myDate.getDate() + 365); //设置为1年之后
var mon = new Array("January","February","March","April","May","June","July","August","September","October","November","December")
var exps = mon[myDate.getMonth()] + " " + myDate.getDate() + "," + myDate.getFullYear(); 
Response.Cookies("numvisits").Expires = exps;
numVisits = Request.Cookies("numvisits");

if(!numVisits) {
    //次登陆
    Response.Cookies("numvisits") = 1;
    Response.Write("<h1>欢迎，这是您次访问该页面</h1>");
} else {
    numVisits++;
    Response.Write("<h1>这是您第 " + numVisits + " 次访问</h1>");
    Response.Cookies("numvisits") = numVisits;
}
%>

JavaScript 脚本编写 Cookies 的 Expires 属性时尽量设置为日期字符格式：

January 9,2017