How to set Input's value to an element?

I am going to set input's value to a text element when button is clicked? How can i do that?

define("ContactPageV2", [], function() {
	return {
		entitySchemaName: "Contact",
		attributes: {},
		modules: /**SCHEMA_MODULES*/{}/**SCHEMA_MODULES*/,
		details: /**SCHEMA_DETAILS*/{}/**SCHEMA_DETAILS*/,
		businessRules: /**SCHEMA_BUSINESS_RULES*/{}/**SCHEMA_BUSINESS_RULES*/,
		methods: {
			onPageClick: function() {
				var GreetingValue = this.get("SalutationType").value;
				var GreetingDisplayValue = this.get("SalutationType").displayValue;
 
 
				console.log(GreetingDisplayValue);
			},
			getMyButtonEnabled: function(){
				return true;
			}
		},
		dataModels: /**SCHEMA_DATA_MODELS*/{}/**SCHEMA_DATA_MODELS*/,
		diff: /**SCHEMA_DIFF*/[
			{
				"operation": "insert",	
				"parentName": "ContactGeneralInfoBlock",
				"propertyName": "items",
				"name": "NewButton",
				"values": {
					itemType: Terrasoft.ViewItemType.BUTTON,
                    caption: {bindTo: "Resources.Strings.NewButtonCaption"},
					click: {bindTo: "onPageClick"},
					enabled: {bindTo: "getMyButtonEnabled"},
					"style": Terrasoft.controls.ButtonEnums.style.BLUE,
					"layout": {
						"column": 12,
						"row": 2,
						"colSpan": 8,
						"rowSpan": 1
					}
 
				},
 
            },
			{
				"operation": "insert",	
				"parentName": "ContactGeneralInfoBlock",
				"propertyName": "items",
				"name": "NewInput",
				"values": {
					itemType: Terrasoft.utils.inputBox,
                    caption: {bindTo: "Resources.Strings.NewButtonCaption"},
					click: {bindTo: "onPageClick"},
					enabled: {bindTo: "getMyButtonEnabled"},
					"style": Terrasoft.controls.ButtonEnums.style.BLUE,
					"layout": {
						"column": 6,
						"row": 3,
						"colSpan": 8,
						"rowSpan": 1
					}
 
				},
			}
		]/**SCHEMA_DIFF*/
	};
});