function init() { var buttons = document.getElementsByClassName("delete1"); for(index = 0; index < buttons.length; index++) { var button = buttons[index]; addClickHandler1(button); } buttons = document.getElementsByClassName("delete2"); for(index = 0; index < buttons.length; index++) { var button = buttons[index]; addClickHandler2(button); } } function addClickHandler1(elem) { elem.addEventListener("click", function() { if (!confirm(deleteMessage1.replace("{0}", elem.getAttribute("client")))) { event.preventDefault(); return false; } }); } function addClickHandler2(elem) { elem.addEventListener("click", function() { if (!confirm(deleteMessage2.replace("{0}", elem.getAttribute("client")))) { event.preventDefault(); return false; } }); } document.addEventListener("DOMContentLoaded", function() { init(); }, true);