function showPage(idp,idb,nb){
var page = idp;
var block = idb;
var nombreTotalPages = nb;
for (z = 1; z <= nombreTotalPages; ++z)

	{

		if(document.getElementById('page' +z + 'b' + idb))

			document.getElementById('page'+z + 'b' + idb).style.display='none';

	}

	if(document.getElementById('page'+page + 'b' + idb))

		document.getElementById('page'+ page + 'b' + idb).style.display='block';
		


};