var randomimage = new Array (
"home01.jpg", 
"home02.jpg", 
"home03.jpg", 
"home04.jpg"
);
var alttext = new Array (
"A photo of Anne, who had a cochlear implant fitted.", 
"A photo of Iris, enjoying a bowling trip organised by RNID Volunteers.", 
"A photo of Phil, a welder at a steel company in Manchester.",
"A photo of Dr Ruth Taylor, Research Fellow at UCL Ear Institute, London."
);
var i = Math.floor(4*Math.random());
document.write('<img src="_rotatingimages/' + randomimage[i] + '" alt="' + alttext[i] + '" class="homeimage" />');