var sequence = 0;
var image = new Array(
"../images/azuma.jpg",
"../images/karin.jpg",
"../images/hnc1.jpg",
"../images/hnc2.jpg",
"../images/monster.jpg",
"../images/japan.jpg",
"../images/dash.jpg",
"../images/lunge.jpg"
);

function randomImage( )
{
	var index = Math.round((image.length-1)*Math.random());
	sequence = index + 1;
	document.body.style.backgroundImage = 'url(' + image[index] + ')';
}

function sequentialImage( )
{
	document.body.style.backgroundImage = 'url(' + image[sequence] + ')';
	sequence = (sequence + 1) % image.length;
}