<!--
function random_imglink(){
var myimages=new Array()
myimages[1]="/images/offset_gasoline.gif"
myimages[2]="/images/offset_oil.gif"
myimages[3]="/images/offset_cars.gif"

var alttags=new Array()
alttags[1]="37,435 tonnes of CO2 offset = 15,940,032 litres of gasoline"
alttags[2]="37,435 tonnes of CO2 offset = 87,058 barrels of oil"
alttags[3]="37,435 tonnes of CO2 offset = 9,825 cars off the road for one year"


var ry=Math.floor(Math.random()*myimages.length)
if (ry==0)
ry=1
document.write('<img src="'+myimages[ry]+'" border=0 alt="'+alttags[ry]+'">')
}
random_imglink()
//-->
