limit = 8; 
function Random() { today = new Date(); num = today.getTime(); num = (Math.round(Math.abs(Math.sin(num) * 1000000)) % limit) + 1; return num; }
		            
function getprevimage()
{
var imagesrc = document.getElementById('logotile').src;
imagesrc=imagesrc.substring(imagesrc.length-5,imagesrc.length-4);
imagesrc=parseInt(imagesrc)-1;
if (imagesrc==0)
{
imagesrc=limit;
}
imagesrc='/i/m/tile' + imagesrc + '.gif';  
if (document.getElementById('logotile'))
document.getElementById('logotile').src=imagesrc;
}

function getnextimage()
{
var imagesrc = document.getElementById('logotile').src;
imagesrc=imagesrc.substring(imagesrc.length-5,imagesrc.length-4);
imagesrc=parseInt(imagesrc)+1;
if (imagesrc==(limit+1))
{
imagesrc=1;
}
imagesrc='/i/m/tile' + imagesrc + '.gif';  
if (document.getElementById('logotile'))
document.getElementById('logotile').src=imagesrc;
  
}
		var slogotile='/i/m/tile' + Random() + '.gif';  if (slogotile.indexOf('.gif') > -1)  {
		var logotile = document.getElementById('logotile');
		logotile.src=slogotile;
}