// xplat API to move X pos function moveElementLeft (elementName, amount) { var range = "" // empty for Nav4 var styleObj = "" // ditto var leftName = "left" // "left" in Nav4 if (isIE4) { range = ".all" styleObj = ".style" leftName = "pixelLeft" } eval("document" + range + "." + elementName + styleObj + leftName + " += " + amount) }