function IncidentSearchParameters(){}IncidentSearchParameters.ExtentXMin=null;IncidentSearchParameters.ExtentYMin=null;IncidentSearchParameters.ExtentXMax=null;IncidentSearchParameters.ExtentYMax=null;IncidentSearchParameters.CrimeTypes=null;IncidentSearchParameters.DateBegin=null;IncidentSearchParameters.DateEnd=null;IncidentSearchParameters.FilterAgencyID=null;