Answered: Write a code using for the following:…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Write a code using for the following: Include a header that is Your Name, Visit Tracker Complete the code in a single .htm file On the first visit to the page, display a message indicating such (see example below) On each subsequent visit (or refresh) of the page, display a message indicating the day, date, and time of the previous visit (see example below) Include your name as part of the message

Expert Solution

Step 1

Please note that it may not work if your browser has local cookies support turned off

You can put your name wherever "Your Name" appears in this code.

index.htm

<!DOCTYPE html>

<head>

</head>

<body>

function setCookie(cookie_name, cookie_value, exdays) {

var d = new Date();

d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));

var expires = "expires=" + d.toUTCString();

document.cookie = cookie_name + "=" + cookie_value + ";" + expires + ";" + "SameSite=Lax";

}

function getCookie(cookie_name) {

var name = cookie_name + "=";

var ca = document.cookie.split(';');

for (var i = 0; i < ca.length; i++) {

var c = ca[i];

while (c.charAt(0) == ' ') {

c = c.substring(1);

}

if (c.indexOf(name) == 0) {

return c.substring(name.length, c.length);

}

return "";

}

function checkCookie() {

var user = getCookie("username");

var visits = parseInt(getCookie("counter"));

var last_visit = getCookie("last_visit");

if (user != "") {

visits = parseInt(visits) + 1;

document.querySelector("#message").innerHTML = "you have visited this page " + visits + " times.";

document.querySelector("#last_visit_message").innerHTML = "Your last visit was at " + last_visit.toString();

setCookie("username", user, 365);

setCookie("counter", visits, 365);

} else {

user = "Your Name";

visits = 1;

last_visit = new Date();

document.querySelector("#message").innerHTML = "this is your first visit.";

if (user != "" && user != null) {

setCookie("username", user, 365);

setCookie("counter", visits, 365);

}

setCookie("last_visit", new Date(), 365);

}

checkCookie();

var all_cookies = document.cookie;

console.log(all_cookies);

</script>

</body>

</html>

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