MediaWiki:Gadget-toolbaralert2.js

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( function( $, mw ) {
$(document).ready(function() {
	//$( '.usermessage' ).hide();
	var newMsgRevisionId = mw.config.get( 'wgUserNewMsgRevisionId' );
	if ( newMsgRevisionId && !mw.config.get( 'echoNewMsgAlertDisplayed' ) ) {
		$( '#pt-mytalk a' ).append( ':&#160;<span id="mw-echo-alert">You have new messages</span>' );
		$( '#pt-mytalk a' ).css( {
			//'border': '1px solid darkorange',
			'border-radius': '2px',
			'background-color': '#F9C557',
			'padding': '0.3em 0.9em 0.25em 0.9em',
			'color': '#555555',
			'font-weight': 'normal'
		} );
		mw.config.set( 'echoNewMsgAlertDisplayed', true );
	}
} );
} )( jQuery, mediaWiki );