var images = [];
images[0] = new Image(64,30);
images[0].src = 'images/button-home.png';
images[1] = new Image(65,30);
images[1].src = 'images/button-home-roll.png';
images[2] = new Image(114,30);
images[2].src = 'images/button-services.png';
images[3] = new Image(114,30);
images[3].src = 'images/button-services-roll.png';
images[4] = new Image(161,30);
images[4].src = 'images/button-properties.png';
images[5] = new Image(161,30);
images[5].src = 'images/button-properties-roll.png';
images[6] = new Image(113,30);
images[6].src = 'images/button-casestudies.png';
images[7] = new Image(113,30);
images[7].src = 'images/button-casestudies-roll.png';
images[8] = new Image(107,30);
images[8].src = 'images/button-biographies.png';
images[9] = new Image(107,30);
images[9].src = 'images/button-biographies-roll.png';
images[10] = new Image(101,30);
images[10].src = 'images/button-contact.png';
images[11] = new Image(101,30);
images[11].src = 'images/button-contact-roll.png';

function swap( current , next )
{
	current.src = images[next].src;
}