example1. <a href="/e-BIZwebSample/CatalogResellersGrid.asp?WebGridActionString=NavBar_1&WebGridInitialized=True"></a>

example2. <a href="/e-BIZwebSample/CatalogResellersGrid.asp></a>

what is the different between the 1. and 2.??
why there is a string after the '?' at the example1 and what it is for?