Nice one, big thanks to Max.
I've wrapped the functionality in his answerbezmax's answer into jQuery if anyone wants to use it.
(function($) { $.fn.getCursorPosition = function() { var input = this.get(0); if (!input) return; // No (input) element found if ('selectionStart' in input) { // Standard-compliant browsers return input.selectionStart; } else if (document.selection) { // IE input.focus(); var sel = document.selection.createRange(); var selLen = document.selection.createRange().text.length; sel.moveStart('character', -input.value.length); return sel.text.length - selLen; } } })(jQuery);