function JumpWeb(n){
switch(n){
case 1: window.location="index01.html";
break;
case 2: window.location="index02.html";
break;
case 3: window.location="index03.html";
break;
case 4: window.location="index04.html";
break;
case 5: window.location="index05.html";
break;
}
}
var url_item = 5;
JumpWeb(Math.floor((Math.random()*url_item)+1));