Index: ssts-web/src/main/webapp/disinfectsystem/deviceMaintenance/deviceMaintenanceView.js
===================================================================
diff -u -r17184 -r17520
--- ssts-web/src/main/webapp/disinfectsystem/deviceMaintenance/deviceMaintenanceView.js	(.../deviceMaintenanceView.js)	(revision 17184)
+++ ssts-web/src/main/webapp/disinfectsystem/deviceMaintenance/deviceMaintenanceView.js	(.../deviceMaintenanceView.js)	(revision 17520)
@@ -60,7 +60,9 @@
 		editor : new top.Ext.form.NumberField({
 			id : 'amountName',
 			name : 'amountName',
+			allowDecimals : false,
 			allowBlank : false,
+			allowNegative : false,
 			anchor : '90%'
 		})
 	},{
@@ -293,8 +295,8 @@
 								for ( var i = 0, len = records.length; i < len; i++) {
 									var amount = records[i].data['amount'];
 									var price = records[i].data['price'];
-									var temPrice = amount*price;
-									totalPrice += temPrice;
+									var temPrice = mul(amount,price);
+									totalPrice = add(totalPrice,temPrice);
 								}
 								top.Ext.getCmp("totalPrice").setValue(totalPrice);
 							}