function init() { var buttons = document.getElementsByClassName("delete"); for(index = 0; index < buttons.length; index++) { var button = buttons[index]; addClickHandler(button); } } function addClickHandler(elem) { elem.addEventListener("click", function() { if (!confirm(deleteMessage.replace("{0}", elem.getAttribute("client")))) { event.preventDefault(); return false; } }); } document.addEventListener("DOMContentLoaded", function() { init(); }, true);