Try changing your query.where statement to this unless you have a field called Upper(ADDRESS1):
query.where = "ADDRESS1 LIKE '%" + station.toUpperCase() + "%'" ;
Also you have an extra space in the onclick event:
onclick="executeQueryTask(dojo.byId('station').val ue);"
Change it to:
onclick="executeQueryTask(dojo.byId('station').value);"
I hope this helps.