next level

i’m a member of a website and to go on to the next level you have to break encoding or scripting or anything like that. i’m stuck on this one. can anyone tell me how this script works. all i can figure is it add’s and subtracts junk to what your suppose to type.

<SCRIPT>

var string = “3be315jfnbcv7323fx”;
var enigma = “”;
var whatisthis = “var myxor = prompt(‘Password:’,”);for (y=1; y<5; y++) {enigma += (string.indexOf(y)+1);}enigma += 5;if (myxor==enigma){enigma = enigma + ‘.php’;location.href=enigma;}else{location.href=’hahaha.php’;}”;

eval(whatisthis);

</SCRIPT>

thank you, tyler

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