Locks screen behind the popup
lockScreen([options])

options | object, optional, options for the popup

#### Description

This method is used internally to lock the screen behind the popup so that the user cannot interact with it. It is possible to use this method to lock the screen without displaying popup.
Simple lock (user can unlock) w2popup.lockScreen(); Modal lock (user cannot unlock) w2popup.lockScreen({ modal: true }); OR you can also lock screen and display a popup w2popup.open({ width : 220, height : 60, modal : true, body : '<div class="w2ui-centered"><div style="padding: 10px;">'+ ' <div class="w2ui-spinner" '+ ' style="width: 22px; height: 22px; position: relative; top: 6px;"></div>'+ ' Loading... '+ '</div></div>' });