if a form box is empty

jay25 · Jun 16, 2002

I am trying to get some statements executed in a case a form box is empty and I tried comparing the value (theform.thebox.value) to null, NaN, undefined but it doesn't seem to work. Anybody know how to do it?

Code:

if (theform.thebox.value == null)
alert(&quot;You got it!&quot;);
else
alert(theform.thebox.value);

tlhawkins · Jun 16, 2002

Hey Jay25,

When you say form BOX do you mean text input?

if so this should work:

if (document.form.field.value == "&quot

{
alert("It's empty&quot

;
}

If you mean a checkbox input then use this:

if (document.test.testbox.checked == true)
{
alert("checked&quot

;
}

Hope that covers it...
If not post more code, we'll figure it out.

NEVERSLEEP · Jun 16, 2002

<html>
<head>
<script type="text/javascript">
<!--
function test() {
if (document.theform.thebox.value == "&quot

{
alert("no value&quot

;
} else {
alert(document.theform.thebox.value);
}
}
//-->
</script>
</head>
<body>
<form name="theform">
<input type="text" name="thebox"><br>
<input type="button" value="test" onclick="test()">
</form>
</body>
</html> ---------------------------------------

someone knowledge ends where
someone else knowledge starts

NEVERSLEEP · Jun 16, 2002

seems we posted at the same time ... ---------------------------------------

someone knowledge ends where
someone else knowledge starts

tlhawkins · Jun 16, 2002

No prob,

Don't worry,

I don't know the answer to the next one

jay25 · Jun 16, 2002

It was a text input box and the empty quotes worked. Thanks! For some reason, everytime I got back to this site, I had 0 responses. But when I clicked on the post, I saw that you all wrote in it. And I didn't use the back button to get back to the site but used the favorites. I had to reload my browser to get an updated front page. Maybe it's just my computer.

jemminger · Jun 17, 2002

jay25,

if you're using IE, check in Tools > Internet Options > Settings (Temporary Internet Files) and make sure you're not set to "Never". I'm set to "Automatically."

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if a form box is empty

jay25

MIS

tlhawkins

Programmer

NEVERSLEEP

Programmer

NEVERSLEEP

Programmer

tlhawkins

Programmer

jay25

MIS

jemminger

Programmer

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