var image = new Array(4);
image[0] = 'images/topSloganBar_01.jpg'
image[1] = 'images/topSloganBar_02.jpg'
image[2] = 'images/topSloganBar_03.jpg'
image[3] = 'images/topSloganBar_04.jpg'

function choosepic() {
if (document.images) {
	index = Math.floor(Math.random() * image.length)
	document.base.src = image[index]
	}
}