Strange Behavior of call javascript -

i'm studying javascript, , found example on book

function saynameforall(label) {     console.log(label + ":" + this.name); } var person1 = {     name: "nicholas" }; var person2 = {     name: "greg" }; var name = "michael"; saynameforall.call(this, "global"); saynameforall.call(person1, "person1"); saynameforall.call(person2, "person2"); 

this outputs:

"global:michael" "person1:nicholas" "person2:greg" 

i understand how call works, output of saynameforall.call(this, "global"); isn't global:michael global:result.

this code http://jsfiddle.net/rho3zyb4/

you're running code in jsfiddle, aren't you: http://jsfiddle.net/4g8q9yor/ - jsfiddle has assigned iframe name javascript outputs result - you're getting dom iframe name.

create file on local machine , you'll see correct output or try elsewhere: http://js.do/code/48143 outputs:

global:michael person1:nicholas person2:greg