While scrolling my web site a DIV that have a relevant video isn't going behind the very best DIV. On my small web site a high DIV,that have folloing css styling

#header{
font-size:11px;
height:25px;
position:fixed;
top:0;
width:960px;
z-index:1000;
}

Now after clearing all sailed element,I added a relevant video on the wrapper DIV like just like by doing this..

<div id="vedio">
<object>video code</object>
</div>

Using CSS

#vedio{
position:relative;
text-align:center;
z-index:0;
}

After doing all stuff video isn't going behind header in FireFox3.6,Google Chrome.Please Someone Assist me. Thanks

Which Browser are you currently testing in? IE has z-index:0; issues, begin with 1 or -1 and move from there.

Edit:

Add this for your object:

<param name="wmode" value="transparent">

which for your embed:

wmode="transparent" and don't forget to shut your embed tag with either </embed> or since you are using XHTML doctype: />. I added these in firebug and delay pills work fine :)

<object width="606" height="385">
            <param name="movie" value="http://www.youtube.com/v/RjUIarUAioY&hl=en_US&fs=1&color1=0x2b405b&color2=0x6b8ab6"></param>
            <param name="allowFullScreen" value="true"></param>
            <param name="allowscriptaccess" value="always"></param>
            <param name="wmode" value="transaprent"></param>
            <embed src="http://www.youtube.com/v/RjUIarUAioY&hl=en_US&fs=1&color1=0x2b405b&color2=0x6b8ab6"
                   type="application/x-shockwave-flash"
                   allowscriptaccess="always"
                   allowfullscreen="true"
                   width="606" height="385"
                   wmode="transparent">
            </embed>
        </object>

Additionally you had z-index; 999; on #wp-admin-bar *, I added it towards the parent #wp-admin-bar .padder simply to make certain the kids would inherit the worthiness.

Within the object of video, try setting a param:

wmode = transparent

Which browser are you currently using? Ie has a tendency to have numerous z-index difficulties with form elements, embeds, etc.