Dear dday,

 

rangeCount: The number of ranges within the selectionRange object.  In IE and FF 3+ one can select several contiguous sections [& thereby have multiple ranges] by holding the control key while selecting.   Furthermore, in all versions of FF, other ranges can be added using the addRange method.  In Webkit & Opera the rangeCount is always 1.

 

Original article can be found in http://blog.siteroller.net/understanding-javascript-selection-and-range

 

Thank you for asking

Eric@cutesoft.net