Page: Attach handlers using ._on(). Helps fix #2215

When a page widget is destroyed on an element, the pagebeforehide and pagebeforeshow handlers must be removed, otherwise, if another page widget is instantiated on the same element later on, the handlers from the previous instance will be left around and so the new instance will have the two events handled twice.

js/widgets/page.js

@@ -15,30 +15,29 @@ $.widget( "mobile.page", $.mobile.widget, {
 	},
 
 	_create: function() {
-
-		var self = this;
-
 		// if false is returned by the callbacks do not create the page
-		if ( self._trigger( "beforecreate" ) === false ) {
+		if ( this._trigger( "beforecreate" ) === false ) {
 			return false;
 		}
 
-		self.element
+		this.element
 			.attr( "tabindex", "0" )
-			.addClass( "ui-page ui-body-" + self.options.theme )
-			.bind( "pagebeforehide", function() {
-				self.removeContainerBackground();
-			} )
-			.bind( "pagebeforeshow", function() {
-				self.setContainerBackground();
-			} );
+			.addClass( "ui-page ui-body-" + this.options.theme );
 
+		this._on( this.element, {
+			pagebeforehide: "removeContainerBackground",
+			pagebeforeshow: "_handlePageBeforeShow"
+		});
 	},
-
+
+	_handlePageBeforeShow: function( e ) {
+		this.setContainerBackground();
+	},
+
 	removeContainerBackground: function() {
 		$.mobile.pageContainer.removeClass( "ui-overlay-" + $.mobile.getInheritedTheme( this.element.parent() ) );
 	},
-	
+
 	// set the page container background to the page theme
 	setContainerBackground: function( theme ) {
 		if ( this.options.theme ) {