Hedera.ItemsForm = new Class ({ Extends: Hedera.Form ,activate: function () { this.$('warehouse').value = 7; this.$('realm').value = null; } ,onPreviewClick: function () { var batch = new Sql.Batch (); batch.addValues ({ 'warehouse': this.$('warehouse').value ,'realm': this.$('realm').value ,'rate': this.$('rate').value }); this.gui.openReport ('items-report', batch); } });