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sms9z

2008-Jan-09 04:16 UTC

Using Prototype - Getting Javascript Error - "Object doesn''t support this property or method"

I have the following javascript being called on my site and I am
getting a Javascript error - "Object doesn''t support this property
or
method". The error is invoked on the line that has - "listItems = $
("vidList").childElements("li");".

The purpose of the Javascript is two fold: ''swapVideo'' to
change the
Youtube video and ''assignB'' to change the bullet for the
<li> from
grey to yellow (yellowdot). This needs to be invoked when the
corresponding link to the list item is clicked up on.

Please help. Would much appreciate any inputs as I have spent a day
trying to everything under the sun without much luck

Thanks
Sharmil

<ul id="vidList">
<li><a href="{youtube link 1}">Text1</a></li>
<li><a href="{youtube link 2}">Text2</a></li>
...
<li><a href="{youtube link 3}">Text3</a></li>
</ul>

<script type="text/javascript">
function swapVideo(thevideo,isDefault){

	if(isDefault==true)
	{
		listItems = $("vidList").childElements("li");
		listItems.each
		(
			function(item)
			{
				Event.observe($(item).childElements("a")[0], "click",
assignB);
			}
		)
	}

	var so = new SWFObject(thevideo, "vidplayer", "<?php if
(is_numeric($width)) echo $width; else echo $dw; ?>", "<?php if
(is_numeric($height)) echo $height; else echo $dh; ?>", "8",
"#000000");
	so.addParam("wmode", "transparent");
	so.write("videoPlayer");
}

function assignB(o)
{
	listItems = $("vidList").childElements("li");
	listItems.each
	(
		function(item)
		{
			$(item).className =
$(item).className.replace("yellowdot","");
		}
	)

	var eElement  = Event.element(o);
	eParents=eElement.ancestors();
	eParents[0].className += "yellowdot";
}

</script>
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Wizz

2008-Jan-09 08:08 UTC

head link

Re: Using Prototype - Getting Javascript Error - "Object doesn''t support this property or method"

// listItems = $("vidList").childElements("li");
the childElements() method doesn''t accept any parameters... you either
user it without the "li":
    listItems = $(''vidList'').childElements();

use the select method:
    listItems = $(''vidList'').select(''li'');

or use a css-selector:
    listItems = $$(''#vidList li'');

That ''should'' solve your problem.

Greetz,

Wizz

On 9 jan, 05:16, sms9z <shar...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> I have the following javascript being called on my site and I am
> getting a Javascript error - "Object doesn''t support this
property or
> method". The error is invoked on the line that has - "listItems =
$
> ("vidList").childElements("li");".
>
> The purpose of the Javascript is two fold: ''swapVideo'' to
change the
> Youtube video and ''assignB'' to change the bullet for the
<li> from
> grey to yellow (yellowdot). This needs to be invoked when the
> corresponding link to the list item is clicked up on.
>
> Please help. Would much appreciate any inputs as I have spent a day
> trying to everything under the sun without much luck
>
> Thanks
> Sharmil
>
> <ul id="vidList">
> <li><a href="{youtube link
1}">Text1</a></li>
> <li><a href="{youtube link
2}">Text2</a></li>
> ...
> <li><a href="{youtube link
3}">Text3</a></li>
> </ul>
>
> <script type="text/javascript">
> function swapVideo(thevideo,isDefault){
>
>         if(isDefault==true)
>         {
>                 listItems =
$("vidList").childElements("li");
>                 listItems.each
>                 (
>                         function(item)
>                         {
>                                
Event.observe($(item).childElements("a")[0], "click",
assignB);
>                         }
>                 )
>         }
>
>         var so = new SWFObject(thevideo, "vidplayer",
"<?php if
> (is_numeric($width)) echo $width; else echo $dw; ?>",
"<?php if
> (is_numeric($height)) echo $height; else echo $dh; ?>",
"8",
> "#000000");
>         so.addParam("wmode", "transparent");
>         so.write("videoPlayer");
>
> }
>
> function assignB(o)
> {
>         listItems = $("vidList").childElements("li");
>         listItems.each
>         (
>                 function(item)
>                 {
>                         $(item).className =
$(item).className.replace("yellowdot","");
>                 }
>         )
>
>         var eElement  = Event.element(o);
>         eParents=eElement.ancestors();
>         eParents[0].className += "yellowdot";
>
> }
>
> </script>--~--~---------~--~----~------------~-------~--~----~
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-~----------~----~----~----~------~----~------~--~---

Wizz

2008-Jan-09 08:24 UTC

head link

Re: Using Prototype - Getting Javascript Error - "Object doesn''t support this property or method"

Now I looked at your first function, it might be even better to get
the links right away instead of iterating through the listitems first:

if (isDefault==true) {
  $$(''#vidList li a'').invoke(''observe'',
''click'', assignB);
}

as you can see it saves a lot of code 8)

Greetz.

On 9 jan, 05:16, sms9z <shar...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> I have the following javascript being called on my site and I am
> getting a Javascript error - "Object doesn''t support this
property or
> method". The error is invoked on the line that has - "listItems =
$
> ("vidList").childElements("li");".
>
> The purpose of the Javascript is two fold: ''swapVideo'' to
change the
> Youtube video and ''assignB'' to change the bullet for the
<li> from
> grey to yellow (yellowdot). This needs to be invoked when the
> corresponding link to the list item is clicked up on.
>
> Please help. Would much appreciate any inputs as I have spent a day
> trying to everything under the sun without much luck
>
> Thanks
> Sharmil
>
> <ul id="vidList">
> <li><a href="{youtube link
1}">Text1</a></li>
> <li><a href="{youtube link
2}">Text2</a></li>
> ...
> <li><a href="{youtube link
3}">Text3</a></li>
> </ul>
>
> <script type="text/javascript">
> function swapVideo(thevideo,isDefault){
>
>         if(isDefault==true)
>         {
>                 listItems =
$("vidList").childElements("li");
>                 listItems.each
>                 (
>                         function(item)
>                         {
>                                
Event.observe($(item).childElements("a")[0], "click",
assignB);
>                         }
>                 )
>         }
>
>         var so = new SWFObject(thevideo, "vidplayer",
"<?php if
> (is_numeric($width)) echo $width; else echo $dw; ?>",
"<?php if
> (is_numeric($height)) echo $height; else echo $dh; ?>",
"8",
> "#000000");
>         so.addParam("wmode", "transparent");
>         so.write("videoPlayer");
>
> }
>
> function assignB(o)
> {
>         listItems = $("vidList").childElements("li");
>         listItems.each
>         (
>                 function(item)
>                 {
>                         $(item).className =
$(item).className.replace("yellowdot","");
>                 }
>         )
>
>         var eElement  = Event.element(o);
>         eParents=eElement.ancestors();
>         eParents[0].className += "yellowdot";
>
> }
>
> </script>--~--~---------~--~----~------------~-------~--~----~
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-~----------~----~----~----~------~----~------~--~---

Wizz

2008-Jan-09 08:44 UTC

head link

Re: Using Prototype - Getting Javascript Error - "Object doesn''t support this property or method"

I might be looking like a crazy person right (posting 3 times in a
row), but while I was at it I rewrote your other function too.

Prototype has methods and functions for a lot of standard operations,
why not use them if they''re there?

function swapVideo(thevideo,isDefault) {
  if(isDefault==true) {
    $$(''#vidList li a'').invoke(''observe'',
''click'', function(ev) {
      ev.stop();
      assignB(this);
    });
  }
  var so = new SWFObject(thevideo, "vidplayer", "<?php if
(is_numeric($width)) echo $width; else echo $dw; ?>", "<?php if
(is_numeric($height)) echo $height; else echo $dh; ?>", "8",
"#000000");
  so.addParam("wmode", "transparent");
  so.write("videoPlayer");
}

function assignB(el) {
  $$(''#vidList
li'').invoke(''removeClassName'',
''yellowdot'');
  el.up(''li'').addClassName(''yellowdot'');
}

This might not even be the most optimal way to do it, but it takes a
lot less code then your example.

I advise you to look through the API pages (http://prototypjs.org/api)
to see what kind of functions there to make your life a lot easier.

Greetz,

Wizz

On 9 jan, 09:24, Wizz <woutaw...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Now I looked at your first function, it might be even better to get
> the links right away instead of iterating through the listitems first:
>
> if (isDefault==true) {
>   $$(''#vidList li a'').invoke(''observe'',
''click'', assignB);
>
> }
>
> as you can see it saves a lot of code 8)
>
> Greetz.
>
> On 9 jan, 05:16, sms9z
<shar...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > I have the following javascript being called on my site and I am
> > getting a Javascript error - "Object doesn''t support
this property or
> > method". The error is invoked on the line that has -
"listItems = $
> > ("vidList").childElements("li");".
>
> > The purpose of the Javascript is two fold:
''swapVideo'' to change the
> > Youtube video and ''assignB'' to change the bullet for
the <li> from
> > grey to yellow (yellowdot). This needs to be invoked when the
> > corresponding link to the list item is clicked up on.
>
> > Please help. Would much appreciate any inputs as I have spent a day
> > trying to everything under the sun without much luck
>
> > Thanks
> > Sharmil
>
> > <ul id="vidList">
> > <li><a href="{youtube link
1}">Text1</a></li>
> > <li><a href="{youtube link
2}">Text2</a></li>
> > ...
> > <li><a href="{youtube link
3}">Text3</a></li>
> > </ul>
>
> > <script type="text/javascript">
> > function swapVideo(thevideo,isDefault){
>
> >         if(isDefault==true)
> >         {
> >                 listItems =
$("vidList").childElements("li");
> >                 listItems.each
> >                 (
> >                         function(item)
> >                         {
> >                                
Event.observe($(item).childElements("a")[0], "click",
assignB);
> >                         }
> >                 )
> >         }
>
> >         var so = new SWFObject(thevideo, "vidplayer",
"<?php if
> > (is_numeric($width)) echo $width; else echo $dw; ?>",
"<?php if
> > (is_numeric($height)) echo $height; else echo $dh; ?>",
"8",
> > "#000000");
> >         so.addParam("wmode", "transparent");
> >         so.write("videoPlayer");
>
> > }
>
> > function assignB(o)
> > {
> >         listItems =
$("vidList").childElements("li");
> >         listItems.each
> >         (
> >                 function(item)
> >                 {
> >                         $(item).className =
$(item).className.replace("yellowdot","");
> >                 }
> >         )
>
> >         var eElement  = Event.element(o);
> >         eParents=eElement.ancestors();
> >         eParents[0].className += "yellowdot";
>
> > }
>
> > </script>--~--~---------~--~----~------------~-------~--~----~
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LexNonScripta

2008-Jan-09 10:35 UTC

head link

Re: Using Prototype - Getting Javascript Error - "Object doesn''t support this property or method"

On Jan 9, 9:44 am, Wizz
<woutaw...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> I might be looking like a crazy person right (posting 3 times in a
> row)...
No, not a crazy person... Just a caring one :)

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