Property Access 
SAP Manufacturing Integration and Intelligence (SAP MII) uses design patterns to access properties. For most parameters, you can prefix the parameter name with get to retrieve a specific applet attribute or set to assign a parameter value. For example, to read the refresh interval using the applet parameter name RefreshRate, use the following syntax:
currentRefreshRate = document.<appletName>.getRefreshRate();
To write the refresh interval, use the following syntax
document.<appletName>.setRefreshRate(60);
Boolean Properties
Boolean data types are an exception. To return a Boolean, use an is method followed by the attribute name. To read a Boolean applet property like AutoRefresh, use the following syntax:
currentAutoRefresh = document.<appletName>.isAutoRefresh();
To write the value, use the following syntax:
document.<appletName>.setAutoRefresh(true);
Indexed Properties
Another exception is indexed properties. To set a tag name in a query object or min/max scaling ranges in a chart, the get/set or is/set methods require an additional parameter that corresponds to the index of the item to be read or written. The first SAP MII indexed property has a value of one. For example, to set the first three tags, you could use the following script:
document.<appletName>.getQueryObject().setTagName(1,"ReactorLevel");
document.<appletName>.getQueryObject().setTagName(2,"ReactorTemperature");
document.<appletName>.getQueryObject().setTagName(3,"ReactorPressure");
To synchronize scaling between three tags, you could use script similar to the following:
var minRange,maxRange;
minRange = document.<appletName>.getChartObject().getMinRange(1);
maxRange = document.<appletName>.getChartObject().getMaxRange(2);