<style>  
#bayram {  
 
position : fixed;  
top : 0;  
_top : expression(eval(document.body.scrollTop ) );  
right : 0;  
left : 0;  
margin : 0; 
 }
 .yuk{

max-width: 30%;
max-height: 30%;

 }
 

</style>  

<div class="yuk"  id="bayram">  


<img class="yuk" alt="23 Nisan"   src="http://www.hareketligifler.net/data/media/903/turkiye-bayragi-hareketli-resim-0029.gif"
    />


</div>