var homeImg = parseInt(Math.random()*7)

homeImg++

var altText = new Array();

altText[0] = ""
altText[1] = "Lambeth Town Hall"
altText[2] = "West Norwood Cemetery"
altText[3] = "The London Eye on the south bank"
altText[4] = "Ritzy Cinema in Brixton"
altText[5] = "A Lambeth Street Market"
altText[6] = "Brockwell Lido"
altText[7] = "The Rookery, Streatham Common"