confirm javascript

var proceed = confirm("Are you sure you want to proceed?");
if (proceed) {
  //proceed
} else {
  //don't proceed
}alert("string");function alertSomethingOrPopUp()
{
  alert("Hi! This is a popup!");
}
alertSomethingOrPopUp();$("#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"
});alert(varible);if (window.confirm("Une nouvelle fenêtre va s'ouvrir.")) {
    window.open("fenetre.html", "Nouvelle fenêtre", "");
}