// Switch pictures
window.addEvent('domready', function() {
	// Array of Elements
	var pictures = $( 'pictures' ).getElements( 'a' );
	var picturesCount = pictures.length;
	var currentIndex = 0;
	
	if( pictures.length > 0 ) {
		pictures[0].setStyle( 'font-weight', 'bold' );
	}
	
	// iterate througth the array
	pictures.each( function( item, index ) {
		item.addEvent( 'click', function( event ) {
			// browser does'nt follow the link
			event.stop();
			
			$( 'picture' ).setProperty( 'src', item.getProperty( 'href' ) );
			
			var prevIndex = currentIndex;
			currentIndex = index;
			
			if( currentIndex != prevIndex )
			{
				pictures[currentIndex].setStyle( 'font-weight', 'bold' );
				pictures[prevIndex].setStyle( 'font-weight', 'normal' );
			}
		});
	});
});