Added is_perpetual_inventory_enabled method

erpnext/public/js/utils.js

@@ -31,6 +31,12 @@ $.extend(erpnext, {
 		}
 	},
 
+	is_perpetual_inventory_enabled: function(company) {
+		if(company) {
+			return frappe.get_doc(":Company", company).enable_perpetual_inventory
+		}
+	},
+
 	setup_serial_no: function() {
 		var grid_row = cur_frm.open_grid_row();
 		if(!grid_row || !grid_row.grid_form.fields_dict.serial_no ||