var fx1 = function(){ var x = 0; return function(){ x = x + 1; return x; } }; var fx2 = fx1(); var fx3 = fx1(); alert(fx2() + ":" + fx2() + ":" + fx2());//#=>1:2:3 alert(fx3() + ":" + fx3() + ":" + fx3());//#=>1:2:3がわかりません ソースを…