// preloadSingleImage 
// Description: General purpose function for peloading a list of images.
// Parameters:  path        - location of images.  e.g. '/images/'
//              preloadList - comma delimited list of obj name & associated image
//                            Note the obj name and image are * delimited
//                            e.g. 'titanImage*titanium.jpg,aquaImage*aqua.jpg,'
//							  List must end with a trailing comma as in example above
// Written by Ron Clabo  8/3/05
// Updated by Ryan Meyers 03/21/11