function goRand() {
var num = 10;  // количество картинок
myImages = new Array();
myImages[0] = "doctor3.jpg";
myImages[1] = "doctor4.jpg";
myImages[2] = "doctor2.jpg";
myImages[3] = "doctor1.jpg";
myImages[4] = "doctor6.jpg";
myImages[5] = "doctor7.jpg";
myImages[6] = "doctor8.jpg";
myImages[7] = "doctor10.jpg";
myImages[8] = "doctor11.jpg";
myImages[9] = "doctor12.jpg";
rand = Math.floor(Math.random() * num);
current_image = myImages[rand];
}
goRand();
document.write("<img src='http://www.uropro.ru/files/images/"+current_image + "''>")