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="photo/random/sv"+random_img1(1,14) +".jpg"
document.write("<img src='"+img_src+"'>")
}