<script language="javascript">      

var delay=1000       
var curindex=0      

var randomimages=new Array()      

        randomimages[0]="1.jpg"      
        randomimages[1]="5.jpg"      
        randomimages[2]="2.jpg"      
        randomimages[3]="4.jpg"      
        randomimages[4]="3.jpg"      
        randomimages[5]="6.jpg"      

var preload=new Array()      

for (n=0;n<randomimages.length;n++)      
{      
        preload[n]=new Image()      
        preload[n].src=randomimages[n]      
}      

document.write('<img name="defaultimage" src="'+randomimages[Math.floor(Math.random()*(randomimages.length))]+'">')      

function rotateimage()      
{      

if (curindex==(tempindex=Math.floor(Math.random()*(randomimages.length)))){      
curindex=curindex==0? 1 : curindex-1      
}      
else      
curindex=tempindex      

        document.images.defaultimage.src=randomimages[curindex]      
}      

setInterval("rotateimage()",delay)      

</script>