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Statement: None.

Solution:

View source:

<html>
<head>
    <title>Obfuscation JS</title>
    <script type="text/javascript">
    function dechiffre(pass_enc){
        var pass = "70,65,85,88,32,80,65,83,83,87,79,82,68,32,72,65,72,65";
        var tab  = pass_enc.split(',');
                var tab2 = pass.split(',');var i,j,k,l=0,m,n,o,p = "";i = 0;j = tab.length;
                        k = j + (l) + (n=0);
                        n = tab2.length;
                        for(i = (o=0); i < (k = j = n); i++ ){o = tab[i-l];p += String.fromCharCode((o = tab2[i]));
                                if(i == 5)break;}
                        for(i = (o=0); i < (k = j = n); i++ ){
                        o = tab[i-l]; 
                                if(i > 5 && i < k-1)
                                        p += String.fromCharCode((o = tab2[i]));
                        }
        p += String.fromCharCode(tab2[17]);
        pass = p;return pass;
    }
    String["fromCharCode"](dechiffre("\x35\x35\x2c\x35\x36\x2c\x35\x34\x2c\x37\x39\x2c\x31\x31\x35\x2c\x36\x39\x2c\x31\x31\x34\x2c\x31\x31\x36\x2c\x31\x30\x37\x2c\x34\x39\x2c\x35\x30"));
    
    h = window.prompt('Entrez le mot de passe / Enter password');
    alert( dechiffre(h) );
    
</script>
</head>

</html>
function dechiffre(pass_enc) {
    var pass = "70,65,85,88,32,80,65,83,83,87,79,82,68,32,72,65,72,65";
    var tab = pass_enc.split(',');
    var tab2 = pass.split(',');
    var i, j, k, l = 0,
        m, n, o, p = "";
    i = 0;
    j = tab.length; // 11
    k = j + (l) + (n = 0); //11
    n = tab2.length; //18
    for (i = (o = 0); i < (k = j = n); i++) {
        o = tab[i - l];
        p += String.fromCharCode((o = tab2[i]));
        if (i == 5) break;
    }
    for (i = (o = 0); i < (k = j = n); i++) {
        o = tab[i - l];
        if (i > 5 && i < k - 1)
            p += String.fromCharCode((o = tab2[i]));
    }
    p += String.fromCharCode(tab2[17]);
    pass = p;
    return pass;
}
String["fromCharCode"](dechiffre("55,56,54,79,115,69,114,116,107,49,50"));

h = window.prompt('Entrez le mot de passe / Enter password');
alert(dechiffre(h));

All of the loop stuff is just a red herring, just String.fromCharCode(55,56,54,79,115,69,114,116,107,49,50) to get 786OsErtk12

Validation: 786OsErtk12