Gets or sets the HTML message displayed when partial chart update is in progress.
If the message begins with the <DIV> tag, then the message will be used as is, otherwise the message will be put into a container first as defined by JsChartViewer.msgContainer before use.
This property is available as both a static property (class property) and an instance property. If you set the static property (class property) using JsChartViewer.updatingMsg, then all JsChartViewer objects will be affected. If you set the instance property using objName.updatingMsg, then only the object being configured will be affected.
The default JsChartViewer.updatingMsg is to display a "rotating clock" icon followed by the text "Updating".