You have two selection lists, the contents of the second is determined by the selection on the first. With PHP you have two choices, as I see it. 1. When a selection occurs on the first box, you force a form submit (OnChange="this.form.submit();") and the php code puts together a new page with the second list filled in with the contents that match the selection in the first list. 2. You send all the contents with your form as a JavaScript array, and when the user clicks on the first list, JavaScript code that you have included in your form changes the contents of the contents of the second list. The first solution is slower requiring a "round trip" to the server and back, but is all PHP. The second is much faster, but requires a good knowledge of JavaScript (many developers do not consider sending JavaScript to the browser with their html, because they don't know JavaScript, but PHP can handle that just fine). hope this helps, Warren Vail -----Original Message----- From: Haidong (Henry) Chen [mailto:myfeng@xxxxxxxxxxx] Sent: Friday, February 13, 2004 9:36 AM To: php-windows@xxxxxxxxxxxxx Subject: How to make linked drop down box Hi, there, Could someone tell how to implement a two or more drop down list with parent and child relationship between them? What I need is something like the following. For example, if click on country, we will see "US< Canada, France, etc". After click on "US", we can see "Arizona, California, Florida, etc" in State box. After click on California in State box, we can see " san Jose, San Francisco, Santa Clara, etc" in City box. Thank you in advance! Henry Position Type : -- Select -- Country : -- Select --U.S.BelgiumChinaIndiaIsraelJapanNetherlandsSingaporeTaiwanUnited KingdomKorea State : -- Select -- City : -- Select -- -- PHP Windows Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
