May I suggest a slightly different way to do this? I hope I'm not taking the fun out of this, but I've done this one before, and it's easier to just post the code :) Gotta love those snippets.
function IsLeapYear(Year) { if(Math.round(Year/4) == Year/4){ if(Math.round(Year/100) == Year/100){ if(Math.round(Year/400) == Year/400) return true; else return false; } else return true; } return false; } function getDays(month, year) { // create array to hold number of days in each month var ar = new Array(12) ar[0] = 31; ar[1] = (IsLeapYear(year)) ? 29 : 28; ar[2] = 31; ar[3] = 30; ar[4] = 31; ar[5] = 30; ar[6] = 31; ar[7] = 31; ar[8] = 30; ar[9] = 31; ar[10] = 30; ar[11] = 31 return ar[month]; } function changeMonth(month, year) { days = getDays(month, year); document.formName.selectName.options.length = 1; for (i = 0; i != days; i++) { o = new Option(i, i, false, false); document.formName.selectName.options[document.formName.selectName.length] = o; } } <form name="formName"> <select name="selectName"> <option value="1">1 </option> </select> </form> jon ----- Original Message ----- From: "Yager, Brian T Contractor/NCCIM" <[EMAIL PROTECTED]> To: "CF-Talk" <[EMAIL PROTECTED]> Sent: Thursday, February 21, 2002 4:39 PM Subject: OT: Any Javascript people out there? I need help with select bo xes... > sorry about the OT post..I need help with a select box. I am making 2 select > boxes (Month and Day). when the user changes the month, I want the javascript > to delete what is in the day select box and fill it with the number of days in > that month. I have the deleting part working. It just won't add. I'm not sure > what I need to do. Here is my code(Please ignore that I HAVE to use ASP for > this).. > ______________________________________________________________________ Get Your Own Dedicated Windows 2000 Server PIII 800 / 256 MB RAM / 40 GB HD / 20 GB MO/XFER Instant Activation · $99/Month · Free Setup http://www.pennyhost.com/redirect.cfm?adcode=coldfusionb FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists