function searchByID(id) {

	var f = document.forms.search;

	f.reset();

	f.idX.value="Y";

	f.id.value=id;

	f.submit();

}

function searchByCategory(id,region,period) {

	var f = document.forms.search;

	f.reset();

	f.categoryX.value="Y";

	f.category.value=id;

	if (region) {

		f.regionX.value="Y";

		f.region.value=region;	

		}

	if (period) {

		f.periodX.value="Y";

		f.period.value=period;	

		}

	f.submit();

}

function searchByPeriod(period) {

	var f = document.forms.search;

	f.reset();

	f.periodX.value="Y";

	f.period.value=period;	

	f.submit();

}

function searchByEngineer(id) {

	var f = document.forms.search;

	f.reset();

	f.engineerX.value="Y";

	f.engineer.value=id;

	f.submit();

}