Test if text box is readonly

harry

<input type="text" name="actreqto" maxlength="20" value=""
onkeypress="changedDetails();" onchange="changedDetails();"
readonly="readonly">

Any ideas why doesn't this work?

alert(top.document.forms[0].actreqto.readonly);

displays 'undefined'

alert(top.document.forms[0].actreqto.readonly=='readonly');

displays 'false'

thanks

harry

Jul 23 '05 #1

Subscribe Reply

11299

ZER0

On Sun, 16 May 2004 08:57:06 GMT, harry wrote:

<input type="text" name="actreqto" maxlength="20" value=""
onkeypress="changedDetails();" onchange="changedDetails();"
readonly="readonly">

Any ideas why doesn't this work?

alert(top.document.forms[0].actreqto.readonly);
alert(top.document.forms[0].actreqto.readOnly);
alert(top.document.forms[0].actreqto.readonly=='readonly');

readOnly is a boolean.

--
C'ya,
ZER0 :: coder.gfxer.webDesigner();

"When you have eliminated the impossible, whatever remains,
however improbable, must be the truth." (S.H.)

Jul 23 '05 #2

harry

Thanks for that Zero, was hoping to test if a key was pressed in a text box
that has readOnly set.

Any ideas why this returns false regardless of this setting?
function changedDetails()
{
alert(this.readOnly==true);
..
..
..
}

cheers

"ZER0" <ze********@libero.it> wrote in message
news:ms**************@ID-171124.news.individual.net...

On Sun, 16 May 2004 08:57:06 GMT, harry wrote:
<input type="text" name="actreqto" maxlength="20" value=""
onkeypress="changedDetails();" onchange="changedDetails();"
readonly="readonly">

Any ideas why doesn't this work?

alert(top.document.forms[0].actreqto.readonly);

alert(top.document.forms[0].actreqto.readOnly);
alert(top.document.forms[0].actreqto.readonly=='readonly');

readOnly is a boolean.

--
C'ya,
ZER0 :: coder.gfxer.webDesigner();

"When you have eliminated the impossible, whatever remains,
however improbable, must be the truth." (S.H.)

Jul 23 '05 #3

ZER0

On Mon, 17 May 2004 10:33:49 GMT, harry wrote:

Thanks for that Zero, was hoping to test if a key was pressed in a text box
that has readOnly set.

Any ideas why this returns false regardless of this setting?

Yes. Because the "this" keyword in that context is NOT your HTML input
object.

Try this:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html>
<head>
<title></title>
</head>

<body>
<script type="text/javascript">
function changedDetails(sender){
if (sender.readOnly)
alert("the element "+sender.name+" is readonly");
else
alert("the element "+sender.name+" is editable");
}
</script>

<input type="text" name="actreqto" maxlength="20" value=""
onkeypress="changedDetails(this);" readonly="readonly" />

</body>
</html>
--
C'ya,
ZER0 :: coder.gfxer.webDesigner();

"Nei film americani, qualsiasi problema che venga considerato
sufficientemente catastrofico, puo' essere risolto facendo esplodere uno
o piu' ordigni nucleari" (ZER0 & Cosimo)

Now playing: "No more chances"

Jul 23 '05 #4

harry

Excellent! works perfectly - thanks again!

"ZER0" <ze********@libero.it> wrote in message
news:hc**************@ID-171124.news.individual.net...

On Mon, 17 May 2004 10:33:49 GMT, harry wrote:
Thanks for that Zero, was hoping to test if a key was pressed in a text box that has readOnly set.

Any ideas why this returns false regardless of this setting?

Yes. Because the "this" keyword in that context is NOT your HTML input
object.

Try this:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html>
<head>
<title></title>
</head>

<body>
<script type="text/javascript">
function changedDetails(sender){
if (sender.readOnly)
alert("the element "+sender.name+" is readonly");
else
alert("the element "+sender.name+" is editable");
}
</script>

<input type="text" name="actreqto" maxlength="20" value=""
onkeypress="changedDetails(this);" readonly="readonly" />

</body>
</html>
--
C'ya,
ZER0 :: coder.gfxer.webDesigner();

"Nei film americani, qualsiasi problema che venga considerato
sufficientemente catastrofico, puo' essere risolto facendo esplodere uno
o piu' ordigni nucleari" (ZER0 & Cosimo)

Now playing: "No more chances"

Jul 23 '05 #5

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