var images = new Array();

images[0] =  "images/refresh_img/banner00.jpg"; 
images[1] =  "images/refresh_img/banner01.jpg";
images[2] =  "images/refresh_img/banner02.jpg";
images[3] =  "images/refresh_img/banner03.jpg";
images[4] =  "images/refresh_img/banner04.jpg";
images[5] =  "images/refresh_img/banner05.jpg";
images[6] =  "images/refresh_img/banner06.jpg";
images[7] =  "images/refresh_img/banner07.jpg";
images[8] =  "images/refresh_img/banner08.jpg";
images[9] =  "images/refresh_img/banner09.jpg";
images[10] = "images/refresh_img/banner10.jpg";
images[11] = "images/refresh_img/banner11.jpg";
images[12] = "images/refresh_img/banner12.jpg";
images[13] = "images/refresh_img/banner13.jpg";
images[14] = "images/refresh_img/banner14.jpg";
images[15] = "images/refresh_img/banner15.jpg";
images[16] = "images/refresh_img/banner16.jpg";
images[17] = "images/refresh_img/banner17.jpg";


function ShowImg() {
var number = images.length;
var increment = Math.floor(Math.random() * number);
var strTemp ='<img src="' + images[increment] + '">';
document.write(strTemp);
}