var Nimg = 8;

var imglist = new Array(Nimg);

for (i=0; i<Nimg; i++){
  imglist[i] = "http://tu-144.engin.umich.edu/web/image_links/gasdynamics/160/image" + i + ".gif";
}

//var imglist = new Array(
//	"http://tu-144.engin.umich.edu/web/images/faculty/gasdynamics/driscoll/driscoll_160.jpg",
//	"http://tu-144.engin.umich.edu/web/images/faculty/gasdynamics/gallimore/gallimore_160.gif",
//	"http://tu-144.engin.umich.edu/web/images/faculty/gasdynamics/gallimore/gallimore2_160.gif",
//	"http://tu-144.engin.umich.edu/web/images/faculty/gasdynamics/powell/powell1_160.gif",
//	"http://tu-144.engin.umich.edu/web/images/faculty/gasdynamics/powell/powell2_160.gif",
//	"http://tu-144.engin.umich.edu/web/images/faculty/gasdynamics/powell/powell4_160.gif",
//	"http://tu-144.engin.umich.edu/web/images/faculty/gasdynamics/shyy/shyy1_160.gif",
//	"http://tu-144.engin.umich.edu/web/images/faculty/gasdynamics/shyy/shyy2_160.gif"
//);

var textlist = new Array(
	"Gas Turbine",
	"CFD Simulation1",
	"CFD Simulation2",
	"CFD Simulation3",
	"CFD Simulation4",
	"CFD Simulation5",
	"CFD Simulation6",
	"CFD Simulation7"
);

var selectnum = Math.floor((Math.random() * 100)) % imglist.length;
var off1 = (selectnum+1) % imglist.length;
var off2 = (selectnum+2) % imglist.length;
var off3 = (selectnum+3) % imglist.length;

var output =  "<img src=" + imglist[selectnum] + " alt = " + textlist[selectnum] + " >"
+ "<img src=" + imglist[off1] + " alt = " + textlist[off1] + " >"
+ "<img src=" + imglist[off2] + " alt = " + textlist[off2] + " >"
+ "<img src=" + imglist[off3] + " alt = " + textlist[off3] + " >";

			   
document.write(output);