// xplat API to set top-level image's SRC function setImageSource (elementName, imageName, newSRC) { var theObj if (isNav4) { theObj = eval("document." + elementName + ".document.images[\"" + imageName + "\"]") } if (isIE4) { theObj = eval("document.all." + imageName) } if (theObj) { theObj.src = newSRC } }