function changeImage(id,status) {

    	var infoButtonHoverFile = 'images/proshot-button-info-hover.gif';
	var infoButtonFile = 'images/proshot-button-info.gif';

	// info button hover effect
    	if( id == 'infoButton' && status == 'hover') {
    		document[id].src = infoButtonHoverFile;
	} else if ( id == 'infoButton' && status == 'normal') {
    		document[id].src = infoButtonFile;
	}
    }