랜덤이미지배너

이렇게 하면 되는건가요?

<div>
<script>
 var banners = new Array() ;
      
 banners[0] = '<div><a href="" target="_blank" /><img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQKTJek6_ge5gp3UXM9OhsHf9h_AauxXhIhFg&usqp=CAU" border="0" /></a></div>' ;
 banners[1] = '<div><a href="" target="_blank" /><img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTYZAAiEM-pyCUHD7jUdfzv75D0pdvwCpJ7UQ&usqp=CAU" border="0" /></a></div>' ;
 banners[2] = '<div><a href="" target="_blank" /><img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSbdo-yC0Z-hXyx1-ep1Rn1KWau0BkSU4qw6Q&usqp=CAU" border="0" /></a></div>' ;
 banners[3] = '<div><a href="" target="_blank" /><img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSW4XHAc_3e_m2S-bQFIjgrCWWSIfOCKrCDOw&usqp=CAU" border="0" /></a></div>' ;
 banners[4] = '<div><a href="" target="_blank" /><img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcScIGatWRvdQvQ74YXqMuIZlw8zIHt0uaz0iA&usqp=CAU" border="0" /></a></div>' ;
 banners[5] = '<div><a href="" target="_blank" /><img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRhg8TwksDw03khK8X87Tgs7AfWNPsGMYQbRA&usqp=CAU" border="0" /></a></div>' ;
 banners[6] = '<div><a href="" target="_blank" /><img src="/web/img/vip_06.jpg" border="0" /></a></div>' ;
  
 var bannerReq = new Array() ;
 var theOne ;
 var z=0 ;
 
 for (i=0; i<banners.length; i++){
  bannerReq[i] = i ;
 
  while (z<banners.length){
   theOne  = Math.floor(Math.random()*banners.length) ;
  
   if (banners[theOne]!="_selected!") {
   document.write(banners[theOne]) ;
   banners[theOne] = "_selected!" ;
                            z++ ;
                           }
    
  }
 }
 
</script>

</div>