javascript detect element as null or undefine

Hi, I have the following script in the bottom of my page:

Code:

---

<script type="text/javascript">
        if (navigator.appName.indexOf('Microsoft Internet Explorer')!=-1){
                document.getElementById("fm_banner-diyur-plus1_704354692").style.top="81px";
        }       
</script>

---

I also have an object with the exact id, before this line of code:

Code:

---

<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
                        id="fm_banner-diyur-plus1_704354692"
                        class="flashmovie"
                        width="673"
                        height="138">
        <param name="movie" value="http://barzilaymor.co.il/diur-plus.co.il/wp-content/uploads/2012/03/banner-diyur-plus1.swf" />
        <!--[if !IE]>-->
        <object        type="application/x-shockwave-flash"
                        data="http://barzilaymor.co.il/diur-plus.co.il/wp-content/uploads/2012/03/banner-diyur-plus1.swf"
                        name="fm_banner-diyur-plus1_704354692"
                        width="673"
                        height="138">
        <!--<![endif]-->
               
<p><a href="http://adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /></a></p>

        <!--[if !IE]>-->
        </object>
        <!--<![endif]-->
</object>

---

And this code is before the script.

Yet when I load the page:
http://barzilaymor.co.il/diur-plus.co.il/

When I load it in IE 9 I get following message:

Quote:

---

SCRIPT5007: Unable to get value of the property 'style': object is null or undefined
diur-plus.co.il, line 487 character 3

---

How come?

After all I do have an element with the id of fm_banner-diyur-plus1_704354692?

and why would it have an style property?
After all, all element have supposed to have style property?

I have changed my script, now it is:

Code:

---

document.getElementsByTagName('object')[1].style.top="81px";

---

when I load it in IE, I still get:

Quote:

---

diur-plus.co.il
SCRIPT5007: Unable to get value of the property 'style': object is null or undefined
diur-plus.co.il, line 487 character 3

---

but when I run it from the console, it does work.

Why is that?

Is your object positioned ? Without a position:absolute or relative for the flashmovie class your object can't be positioned !

You are confusing IDs with Name properties

Since element IDs are supposed to be a unique accessory-thing across the whole of the document -(meaning) only one ID may correspond to a certain person in the whole world -otherwise that ID is no ID at all; it's a useless crap; a forgery; and simply doesn't qualify for an ID anymore: the answer is you should learn more on the fundamental notions that apply far beyond this digital corner of the world!

But, you can do yourself a cross-browser favor with a proper code like:

Code:

---

<object width=300 height=150
id=fm_banner-diyur-plus1_704354692
data=http://barzilaymor.co.il/diur-plus.co.il/wp-content/uploads/2012/03/banner-diyur-plus1.swf>
</object>

---