var timer_id = 0;
var current = 0;
var image_array = new Array ();
image_array[0] = new Image();
image_array[0].src = '../headshot/headshot-1.jpg';
image_array[1] = new Image();
image_array[1].src = '../headshot/headshot-2.jpg';
image_array[2] = new Image();
image_array[2].src = '../headshot/headshot-3.jpg';
image_array[3] = new Image();
image_array[3].src = '../headshot/headshot-4.jpg';
image_array[4] = new Image();
image_array[4].src = '../headshot/headshot-5.jpg';
image_array[5] = new Image();
image_array[5].src = '../headshot/headshot-6.jpg';
image_array[6] = new Image();
image_array[6].src = '../headshot/headshot-7.jpg';
image_array[7] = new Image();
image_array[7].src = '../headshot/headshot-8.jpg';
image_array[8] = new Image();
image_array[8].src = '../headshot/headshot-9.jpg';
image_array[9] = new Image();
image_array[9].src = '../headshot/headshot-10.jpg';
image_array[10] = new Image();
image_array[10].src = '../headshot/headshot-11.jpg';
image_array[11] = new Image();
image_array[11].src = '../headshot/headshot-12.jpg';
image_array[12] = new Image();
image_array[12].src = '../headshot/headshot-13.jpg';

var arraylength= image_array.length;
function next () {
	current = current + 1;
	if ( current == arraylength )
		current = 0;
		imageaddress = image_array[current].src;
		blendimage('blendimage', imageaddress);
}

function previous () {
	current = current - 1;
	if ( current < 0 ) 
		current = arraylength - 1;
		imageaddress = image_array[current].src;
		blendimage('blendimage', imageaddress);
}

function blendimage(imageid, imagefile) {
   
    //make new image
    document.getElementById(imageid).src = imagefile;

}