image1 = new Image();
image1.src = "http://www.isrm.co.uk/images/layout/about_on.gif";

image2 = new Image();
image2.src = "http://www.isrm.co.uk/images/layout/news_on.gif";

image3 = new Image();
image3.src = "http://www.isrm.co.uk/images/layout/education_on.gif";

image4 = new Image();
image4.src = "http://www.isrm.co.uk/images/layout/technical_on.gif";

image5 = new Image();
image5.src = "http://www.isrm.co.uk/images/layout/publications_on.gif";

image6 = new Image();
image6.src = "http://www.isrm.co.uk/images/layout/jobs_on.gif";

image7 = new Image();
image7.src = "http://www.isrm.co.uk/images/layout/members_on.gif";