function preload() {
bgpath='/images-bg';
for (var i=0;i<=bgnummax-1;i++) {
bgimages[i]=new Image();
bgimages[i].src=bgpath+"/"+(i+1)+".jpg";
}
}function getvalbykeypath($arr,$index,$deep=0){
if (is_array($arr) && isset($index[$deep]) && isset($arr[$index[$deep]])) {
$deep++;
$arr=&$arr[$index[$deep]];
getvalbykeypath($arr,$index,$deep);
} else return $arr;
}function setvalbykeypath($arr,$index,$val){
foreach($index as $i) {
if (is_array($arr[$i])) $arr=&$arr[$i];
else {&$arr=$val;return $arr;}
}
}$key=0;$error=false;$ok=false;
do {
$key++;
switch ($key) {
case 1:{...............;break;}
case 2:{...............; break;}
default: $ok=true;
}
} while (!($error && $ok));