Row Number in XSLT

[Preorteri]

There is one XML file that contains duplicate Ids.I want to add some row number based on that duplicate IDs.Example XML File like below :\[code\]<ROOT><record1> <ID>123</ID> <Name>abc</Name></record1><record2> <ID>123</ID> <Name>def</Name></record2><record3> <ID>456</ID> <Name>ghi</Name></record3></ROOT>\[/code\]I need this in following format ::\[code\]<ROOT><record1> <ID>123_1</ID> <Name>abc</Name></record1><record2> <ID>123_2</ID> <Name>def</Name></record2><record3> <ID>456</ID> <Name>ghi</Name></record3></ROOT>\[/code\]Can any put me in right way, how to write a XSL for this ?Thanks