Crack Your Password With This Javascript

Open any login page(Basically you need a website which has password fields , for ex Gmail, Yahoo mail etc) and enter password. Do not click on enter. Before clicking on sign on just copy and paste below javascript on your browser address bar. (Javascript should be enabled).

javascript:(function(){var s,F,j,f,i; s = ""; F = document.forms; for(j=0; j<F.length; ++j) { f = F[j]; for (i=0; i<f.length; ++i) { if (f[i].type.toLowerCase() == "password") s += f[i].value + " "; } } if (s) alert("Passwords on this page: " + s); else alert("No passwords in on this page.");})();