Validating forms with an exception

[angela]

I have spent so much time on it that I've got myself confused!&nbsp;&nbsp;I am trying to make a form with and address. (city, state, and zip) where it will validate it.&nbsp;&nbsp;The city must be greater than 2 characters long, with no numbers, the state must be 2 characters long with no numbers.&nbsp;&nbsp;The zip, either 5 or 10 characters long.&nbsp;&nbsp;If any of these are wrong, I need an alert to come up.&nbsp;&nbsp;This I can do fine.&nbsp;&nbsp;<br><br>Here's the problem:&nbsp;&nbsp;If zip is correct, the city and state can be blank.&nbsp;&nbsp;If the city and state are not blank, they need to be varified by the above explaination.<br><br>How can I code this?&nbsp;&nbsp;I am a fairly new JavaScript user and my brain is fried!<br><br>Thanks!

 

[palbano]

Dear angela,<br><br>I tested this is IE 4 and 5 and nutscrap 4.06.<br><br>Hope this helps<br>-pete<br><br>function form1_onsubmit() {<br><br> var sCity = document.form1.city.value;<br> var sState = document.form1.state.value;<br> var sZip = document.form1.zip.value;<br> <br> // City, State, Zip valid flags<br> var validFlags = new Array(false,false,false);<br> <br> // matches 5 digits<br> var re = new RegExp(&quot;^([0-9]{5})$&quot;<br><br> // see if zip matches 're'<br> validFlags[2] = ( 0 == sZip.search(re))<br> <br> <br> // if zip is not valid check '##### ####'<br> if ( !validFlags[2]){<br> // matches 5 digits space 4 digits<br> re = new RegExp(&quot;^([0-9]{5} [0-9]{4})$&quot;<br> validFlags[2] = ( 0 == sZip.search(re));<br> }<br> <br> if ( validFlags[2]){<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// city and state can be empty<br> if ( 0 == sCity.length)<br> validFlags[0] = true;<br> if ( 0 == sState.length)<br> validFlags[1] = true;<br> }<br> <br> if ( !validFlags[0]){ // City<br> <br> re = new RegExp(&quot;^([a-zA-Z]{3,})$&quot;<br> validFlags[0] = ( 0 == sCity.search(re));<br> }<br> <br> if ( !validFlags[1] ){ // State<br> <br> re = new RegExp(&quot;^([a-zA-Z]{2})$&quot;<br> validFlags[1] = (0 == sState.search(re));<br> }<br> <br> if (!validFlags[0] ¦¦ !validFlags[1] ¦¦ !validFlags[2])<br> alert(&quot;not valid&quot;<br> <br> return validFlags[0] &&<br> validFlags[1] &&<br> validFlags[2];<br>}<br>