var articlesImage = new Image()
articlesImage.src = 'images/articles.gif';

var forumImage = new Image()
forumImage.src = 'images/forum.gif';

var pollsImage = new Image()
pollsImage.src = 'images/polls.gif';

var linksImage = new Image()
linksImage.src = 'images/links.gif';

var contactImage = new Image()
contactImage.src = 'images/contact.gif';

var infoImage = new Image()
infoImage.src = 'images/info.gif';