function random_img1(num1,num2) {
if((num1 - num2) > 0) {
var big = num1
var small = num2
} else {
var big = num2
var small = num1
}
var range = big - small + 1
var number = Math.floor(Math.random()*range) + small
return(number)
}

function random_img2() {
var img_src = "img/top01/" + random_img1(1,3) + ".jpg"
document.write("<IMG SRC='" + img_src + "'>")
}

function random_img3() {
var img_src = "img/top02/" + random_img1(1,8) + ".jpg"
document.write("<IMG SRC='" + img_src + "'>")
}

function random_img4() {
var img_src = "img/top03/" + random_img1(1,8) + ".jpg"
document.write("<IMG SRC='" + img_src + "'>")
}

function random_img5() {
var img_src = "img/top04/" + random_img1(1,6) + ".jpg"
document.write("<IMG SRC='" + img_src + "'>")
}

function random_img6() {
var img_src = "img/top05/" + random_img1(1,6) + ".jpg"
document.write("<IMG SRC='" + img_src + "'>")
}

function random_img7() {
var img_src = "img/top06/" + random_img1(1,4) + ".jpg"
document.write("<IMG SRC='" + img_src + "'>")
}

function random_img8() {
var img_src = "img/top07/" + random_img1(1,6) + ".jpg"
document.write("<IMG SRC='" + img_src + "'>")
}

function random_img9() {
var img_src = "img/top08/" + random_img1(1,6) + ".jpg"
document.write("<IMG SRC='" + img_src + "'>")
}