function toggleImage( el ){
	var element = $( el );
	if(element){
		
		var images = $( el ).select( 'img' );
		var imageNormal = images[0];
		var imageNormalStyle = imageNormal.getStyle('display');
		
		var imageHover = images[1];
		var imageHoverStyle = imageHover.getStyle('display');
		
		if( imageHoverStyle == 'none' ){
			imageNormal.setStyle({ display: 'none' });
			imageHover.setStyle({ display: 'block' });
		}else{
			imageNormal.setStyle({ display: 'block' });
			imageHover.setStyle({ display: 'none' });
		}
	}
	return false;
}