if (document.images){
roll_plain = new Image;
roll_plain.src = 'images/clear-dot.gif';
roll_home = new Image;
roll_home.src = 'images/roll-g-home.gif';
roll_contact = new Image;
roll_contact.src = 'images/roll-g-contact.gif';
roll_sweatshirt = new Image;
roll_sweatshirt.src = 'images/roll-g-news.gif';
roll_help = new Image;
roll_help.src = 'images/roll-g-help.gif';
roll_adopt = new Image;
roll_adopt.src = 'images/roll-g-adopt.gif';
roll_questions = new Image;
roll_questions.src = 'images/roll-g-questions.gif';
roll_residents = new Image;
roll_residents.src = 'images/roll-g-residents.gif';
}
function changeimage(iname, gname) {
     if(document.images){
	        iname.src = gname.src;
        }

}