function checkArray(form, arrayName){
					var retval = new Array();
					for(var i=0; i < form.elements.length; i++){
						var el = form.elements[i];
						if(el.type == "checkbox" && el.name == arrayName && el.checked){
							retval.push(el.value);
						}
					}
					return retval;
				}
				function checkForm(form) {
					
				var regionChecked = checkArray(form, "region[]");
				if(regionChecked.length > 0){
					form.elements["tx_brandenburgsearchconvention_pi1[region]"].value = regionChecked;
				}
			
				var locationChecked = checkArray(form, "location[]");
				if(locationChecked.length > 0){
					form.elements["tx_brandenburgsearchconvention_pi1[location]"].value = locationChecked;
				}
			
				var certificateChecked = checkArray(form, "certificate[]");
				if(certificateChecked.length > 0){
					form.elements["tx_brandenburgsearchconvention_pi1[certificate]"].value = certificateChecked;
				}
			
					form.submit();	
					
					_gaq.push(['_trackEvent','Suche starten',window.location.href,'Suche starten']);		
					return false;
				}