<!--
var banner_id = 1;

function bannerRotate(override){

	if(override && override > 0)
		banner_id = override;
	else {	
		if(banner_id == 6)
			banner_id = 1;
		else
			banner_id++;	
	}

	var text_write = "";
	switch(banner_id){
			case 1:
				document.getElementById('banner').innerHTML = "<a href='http://www.heinz.ca/' target='_blank'><img src='http://www.tomatosphere.org/images/sponsors/heinz.gif' alt='Heinz banner'></a>";
			break;
			case 2:
				document.getElementById('banner').innerHTML = "<a href='http://www.space.gc.ca/' target='_blank'><img src='http://www.tomatosphere.org/images/sponsors/csa.gif' alt='Canadian Space Agency banner'></a>";
			break;
			case 3:
				document.getElementById('banner').innerHTML = "<a href='http://www.oce-ontario.org/' target='_blank'><img src='http://www.tomatosphere.org/images/sponsors/oce.jpg' alt='Ontario Centres of Excellence banner'></a>";
			break;
			case 4:
				document.getElementById('banner').innerHTML = "<a href='http://www.agr.gc.ca/' target='_blank'><img src='http://www.tomatosphere.org/images/sponsors/agriculture.gif' alt='Agriculture and Agri-Food Canada banner'></a>";
			break;
			case 5:
				document.getElementById('banner').innerHTML = "<a href='http://www.uoguelph.ca/' target='_blank'><img src='http://www.tomatosphere.org/images/sponsors/university-of-guelph.gif' alt='University of Guelph banner'></a>";
			break;
			case 6:
				document.getElementById('banner').innerHTML = "<a href='http://www.stokeseeds.com/' target='_blank'><img src='http://www.tomatosphere.org/images/sponsors/stokes-seeds.gif' alt='Stokes Seeds banner'></a>";
			break;
		   }
}
//-->