if (document.images)	{

                img1off = new Image();
                img1off.src = "images/table/services.png";     //inactive Image
                img2off = new Image();
                img2off.src = "images/table/consultants.png";
                img3off = new Image();
                img3off.src = "images/table/email.png";
                img4off = new Image();
                img4off.src = "images/table/clients.png";
                img5off = new Image();
                img5off.src = "images/table/case_studies.png";
                img6off = new Image();
                img6off.src = "images/table/conferences.png";
                img7off = new Image();
                img7off.src = "images/table/data.png";
                img8off = new Image();
                img8off.src = "images/table/publications.png";
                img9off = new Image();
                img9off.src = "images/table/links.png";
                img10off = new Image();
                img10off.src = "images/table/home.png";



                img1on = new Image();
                img1on.src = "images/table/services_a.png";     //Active Image
                img2on = new Image();
                img2on.src = "images/table/consultants_a.png";
                img3on = new Image();
                img3on.src = "images/table/email_a.png";
                img4on = new Image();
                img4on.src = "images/table/clients_a.png";
                img5on = new Image();
                img5on.src = "images/table/case_studies_a.png";
                img6on = new Image();
                img6on.src = "images/table/conferences_a.png";
                img7on = new Image();
                img7on.src = "images/table/data_a.png";
                img8on = new Image();
                img8on.src = "images/table/publications_a.png";
                img9on = new Image();
                img9on.src = "images/table/links_a.png";
                img10on = new Image();
                img10on.src = "images/table/home_a.png";


			}
			
			// Function to 'activate' images.
			function imgOn (imgName)  {
				if (document.images) {
					document[imgName].src = eval(imgName + "on.src");
				}
			}
			
			// Function to 'deactivate' images.
			function imgOff (imgName)  {
				if (document.images) {
					document[imgName].src = eval(imgName + "off.src");
				}
			}