js alert choice code example

Example 1: javascript prompt

var person = prompt("Please enter your name", "Harry Potter");

if (person != null) {
  document.getElementById("demo").innerHTML =
  "Hello " + person + "! How are you today?";
}

Example 2: jquery confirmation dialog example

$("#complexConfirm").confirm({
    title:"Delete confirmation",
    text:"This is very dangerous, you shouldn't do it! Are you really really sure?",
    confirm: function(button) {
        alert("You just confirmed.");
    },
    cancel: function(button) {
        alert("You aborted the operation.");
    },
    confirmButton: "Yes I am",
    cancelButton: "No"
});