Rotate banners

<script type="text/javascript"><!--
//I. Array of banner that will randomly appear


var randompic = new Array ( );
randompic[0] = "";
randompic[1] = "";
randompic[2] = "";
randompic[3] = "";
randompic[4] = "";
randompic[5] = "";
randompic[6] = "";
randompic[7] = "";
randompic[8] = "";
randompic[9] = "";
//II. Array of links that will randomly appear


var randomlink = new Array ( );
randomlink[0] = "";
randomlink[1] = "";
randomlink[2] = "";
randomlink[3] = "";  
randomlink[4] = ""; 
randomlink[5] = "";
randomlink[6] = "";
randomlink[7] = ""; 
randomlink[8] = "";
randomlink[9] = "";
//III. function to generate number from 0 to n


function randomzero (n)
{
  return ( Math.floor ( Math.random ( )*0.9999999999999999* (n + 1)) );
}


//IV. assign any random number from 0 to 2 to x.


x = randomzero(9);


//V. display the image
document.write('<a href="http://' + randomlink[x] + '" rel="nofollow">');
document.write('<img alt="random ad banner" src="' + randompic[x] + '"/>');
document.write('</a>');
//-->
</script>

<script language="JavaScript"><!-- Begin
var total_banner = 3;
var actual_time = new Date()
var second = actual_time.getSeconds()
var show_the_banner = second % total_banner;
show_the_banner +=1;
if (show_the_banner==1) {
txt="";
url="";
alt="";
banner="";
width="";
height="";
}
if (show_the_banner==2) {
txt="";
url="";
alt="";
banner="";
width="";
height="";
}
if (show_the_banner==3) {
txt="";
url="";
alt="";
banner="";
width="";
height="";
}
document.write('<center>');
document.write('<a rel="nofollow" href=\"' + url + '\" target=\"_top\">');
document.write('<img src=\"' + banner + '\" width=')
document.write(width + ' height=' + height + ' ');
document.write('alt=\"' + alt + '\" border=0><br>');
document.write('<small>' + txt + '</small></a>');
document.write('</center>');
// End -->
</script>