Try this:
$(function(){ $('#DNnumber').keyup(function(){ if (parseInt($(this).val()) > 40) { $('#external').attr("checked", "checked"); $('#internal').attr("checked", ""); } else { $('#external').attr("checked", ""); $('#internal').attr("checked", "checked"); } }); }); on 25/05/2009 13:51 ciupaz said::
Hi all, I have two checkboxes like these ones: <span> <input name="place" id="internal" type="checkbox" value="internal" />Internal (up to DN 40)<br /> <input name="place" id="external" type="checkbox" value="external" />External (over DN 40) </span> and a textbox like this: Insert the DN number: <input name="DNnumber" id="DNnumber" type="text" /> I'd like a sort of validation that when the user insert a DN number greater than 40, the checkbox "external" will be automatically selected (without change it). How can I accomplish this? Thanks a lot. Luigi