Mrvs interact with parent form (#1083)

* Update readme.md

* Update Write to Parent Form.js

* Create Portal onLoad.js

Author: bkb68

Catalog Client Script/MRVS Interact With Parent Form/Portal onLoad.js

@@ -0,0 +1,7 @@
+//Using this Catalog Client Script that Applies to the Catalog Item will enable g_form methods like setValue and clearValue which affect Catalog Item variables from a Catalog Client Script that applies to the multi-row variable set
+function onLoad() {
+	if (this) {//we only need to do this for Service Portal
+		//We need to make the g_form object for the parent item available from the MRVS window
+		this.cat_g_form = g_form;
+	}
+}

Catalog Client Script/MRVS Interact With Parent Form/Write to Parent Form.js

@@ -1,7 +1,12 @@
-Use the g_service_catalog.parent object to interact with the parent form from within a MVRS script
+//These methods can be used onLoad, onChange, or onSubmit in a script that Applies to the MRVS 
 
-//Retrieve a variable value from the parent form
+//Retrieve a variable value from the parent form - works in native UI as well as Service Portal, etc.
 g_service_catalog.parent.getValue('variable_name');
 
-//Set a variable value on the parent form
-g_service_catalog.parent.setValue('variable_name');
+//With this approach, you can set a variable value on the parent form - use similar code for other g_form methods like clearValue
+//Service Portal method requires an additional Catalog Client Script onLoad that Applies to the Catalog Item
+if (this) { //Service Portal method
+		this.cat_g_form.clearValue('variable_name');
+	} else { //native UI method
+		parent.g_form.clearValue('variable_name');
+	}

Catalog Client Script/MRVS Interact With Parent Form/readme.md

@@ -1,3 +1,4 @@
-Use this code snippet to interact with the parent form (i.e the main catalogue item) from within a catalog client script on a Multi-row variable set.
+Use this code snippet to interact with the parent form (i.e the main Cataloge Item) from within a Catalog Client Script that applies to a multi-row variable set.
 
-The g_service_catalog object allows for accessing the "parent" GlideForm (g_form) object and its related functions
+The g_service_catalog object allows for accessing the "parent" GlideForm (g_form) object for getValue only (for now?)
+To affect a variable in the main catalogue item using setValue, clearValue, etc. parent.g_form... is available in the native UI, and this.cat_g_form... can be used for Service Portal, etc if an additional Catalog Client Script is used, this one onLoad that Applies to the Catalog Item (not the MRVS).