Form Input validation

ianfo · Sep 16, 2002

Hi,

I've got a really simple html form that takes user input into one box (input name=patchid)

Can someone give me an example of how I would validate patchid to make sure it is a 6 digit number?

I don't know any javascript but i've tried a couple of things with no success so far so any help would be much appreciated.

Thanks

starway · Sep 16, 2002

This seem to be one of the most simple ways:
[tt]
function checkId(field)
{
id = parseInt(field.value);
if ( !isNaN(id) && id>99999 )
return true
else
return false
}
[/tt]
Use it like this:

<form name="f1" action="" onsubmit="return checkId(document.f1.patchid)">
<input type="text" input name="patchid">
<input type="submit">

ianfo · Sep 16, 2002

I'm having some problems getting it to work

All i've changed on the line below is action="cgi-bin/getpatch"

<form name="f1" action="" onsubmit="return checkId(document.f1.patchid)">

Do I need to change document to anything or should it work as it is?

thanks

starway · Sep 16, 2002

No any changes needed. Of course you should specify the target of server-side form processing in "action".
Didn't you forget to place the script in the <head> of your page?
"having some problems getting it to work" - this doesn't tell anything.

ianfo · Sep 16, 2002

I've put the script in between <head> and </head>

I'm getting a syntax error pop up window when I try to load the page. I'll check it over again.

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Form Input validation

ianfo

Programmer

starway

Programmer

ianfo

Programmer

starway

Programmer

ianfo

Programmer

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