Animated Banner Atop the Page, ummm where do I even begin?! Options

[NaShae]

OK, so I'm in a bit of mess, bit off way more than I can chew
the problem; I created an animated banner in After Effects similar to the one on this page (which was probably made in Flash;-> http://www.myspace.com/uknowbigsean ). But I can't work Flash, nor am I a pro in A.E., but I do pretty good.
Anyway I don't know what type to export it out as. FLV? GIF? I don't want it to look low quality due to the status of the client. And once it's exported out to the correct format, which site to I upload it to in order to get the html code?
Please help! And thanks to those who do/try.

[NaShae]

Umm OK, so I've saved it as the flash file SWF, but when I replaced the jpg file with the SWF file for the banner no image showed up. Here's the code;

CODE

<style>
body{ background-position:top center;margin-top: 628 ;}
div.topbanner {
top: 0;
left: 49%;
margin-left: -437px;
width: auto;
height: 628px;
position: absolute;
}
</style>
<div class="topbanner"><img src="http://i950.photobucket.com/albums/ad341/bigmattlives/YG/YGtooBig.swf" /></div><br />

I don't know why it isn't working.