var number_of_images = 6;

random_number = Math.floor((Math.random() * number_of_images));

if (random_number <= 9) {
random_number = "0" + random_number;
} else {
random_number = random_number;
} 

//document.write("<img src='./images/mcfn_background_"+random_number+".jpg' />");
//random_image = "<img src='../images/mcfn_background_"+random_number+".jpg' />";
//front_random_image = "<img src='./images/mcfn_background_"+random_number+".jpg' />";

//function front_random_image(image_id) {

//dom = checkDOM(image_id);
//dom.backgroundImage = "url(./images/mcfn_background_"+random_number+".jpg)";

//}

function front_random_image() {
image_id = "random_image";
dom = checkDOM(image_id);
dom.backgroundImage = "url(./images/mcfn_background_"+random_number+".jpg)";

}

function random_image() {
image_id = "random_image";
dom = checkDOM(image_id);
dom.backgroundImage = "url(../images/mcfn_background_"+random_number+".jpg)";

}