function rollSub(imgName,imgSrc)
	      {
	      if (document.images)
	              { document[imgName].src = imgSrc }
	      }

function rollMain(imgName,imgSrc,img2Name,img2Src)
	      {
	      if (document.images)
	              { document[imgName].src = imgSrc; document[img2Name].src = img2Src; }
	      }

function rolllayer(layer,imgName,imgObj,img2Name,img2Obj) {
			if (document.images) {
				if (document.layers && layer!=null) {
					eval('document.'+layer+'.document.images["'+imgName+'"].src = imgObj'); eval('document.'+layer+'.document.images["'+img2Name+'"].src = img2Obj');
					}
				else {
					document.images[imgName].src = imgObj;document.images[img2Name].src = img2Obj;
					}
			}
		}

function rollEnlarge(layer,imgName,imgObj) {
			if (document.images) {
				if (document.layers && layer!=null) {
					eval('document.'+layer+'.document.images["'+imgName+'"].src = imgObj');
					}
				else {
					document.images[imgName].src = imgObj;
					}
			}
		}