The cleanest way to auto-resize a textarea while typing (like wall post on Facebook) is George Papadakis solution. It uses only standard javascript and provides eventlisteners for IE (attachEvent) and other browsers (addEventListener): [sourcecode language=“javascript”] window.onload = function() { var t = document.getElementsByTagName(’textarea’)[0]; var offset= !window.opera ? (t.offsetHeight - t.clientHeight) : (t.offsetHeight + parseInt(window.getComputedStyle(t, null).getPropertyValue(‘border-top-width’))) ; var resize = function(t) { t.style.height = ‘auto’; t.style.height = (t.scrollHeight + offset ) + ‘px’; } t.addEventListener && t.addEventListener(‘input’, function(event) { resize(t); }); t[‘attachEvent’] && t.attachEvent(‘onkeyup’, function() { resize(t); }); } [/sourcecode] Other solutions are <a href=“https://github.com/padolsey/jQuery.fn.autoResize/blob/master/jquery.autoresize.js, jQuery.autogrow, elastic