function preloadImages() {							//preloads all the images for the page
	if (document.images) {
		var imgFiles=preloadImages.arguments;
		var preloadArray=new Array();
			for (var i=0; i<imgFiles.length; i++) {
				preloadArray[i]=new Image;
				preloadArray[i].src=imgFiles[i]
			}
		}
	}
function changeImage(newImage) {						//changes image files for the radio change effect
	var fileName=newImage+".gif"						//turns newImage string into a .gif name
		document.all.adn_mechanism.src=fileName			//changes the repeat_unit's source name
	}
function newWindow(input) {
   exptSheet=window.open(input,"secondWindow","height=250,width=300","toolbar=no,scrollbars=yes")
   return false
   }