var picNum = Math.round(Math.random()*(20)+1);
if (picNum < 1 || picNum > 20){
    picNum = 1;
}
var url = document.location.href;
var per = url.split("/");
var l = -1;
var level = "";
for (i in per){
    l++;
}
if (l <= 3) {
    level = "";
}
if (l == 4) {
    level = "../";
}
if (l == 5) {
    level = "../../";
}
var changePic = level+"/images/hangulatkepek/"+picNum+".jpg";
dojo.attr("change",{
  "src": changePic 
});