document.getElementById("btnajax").onclick = function() {
    let xhr = new XMLHttpRequest

    xhr.onreadystatechange = function() {
        if (xhr.readyState == 4 && xhr.status == 200) {
            let users = JSON.parse(xhr.responseText)
            let htmlcucc = ""

            for (let egy of users.data) {
                htmlcucc += `<h3 id="${egy.id}"> ${egy.first_name} ${egy.last_name}</h3>`
                htmlcucc += `<p id="p${egy.id}" style="display: none"><img src="${egy.avatar}"><br><small>${egy.email}</small></p>`
            }

            document.getElementById("msg").innerHTML = htmlcucc

            document.querySelectorAll("h3").forEach(a => a.addEventListener("click", e => {
                if (document.getElementById(`p${e.target.id}`).style.display == "block") {
                    document.getElementById(`p${e.target.id}`).style.display = "none"
                }

                else {
                    document.getElementById(`p${e.target.id}`).style.display = "block"
                }
            }))
        }
    }
    xhr.open("GET", "https://reqres.in/api/users?page=2", true)
    xhr.send()
}