Adobe stamp with Javascript form, check a checkbox !

I need to check a checkbox in my stamp, throught my form in Javascript.

I have tried all of this so far :

var f = this.getField("checkBoxStatus");

      f.checked = true;

this.getField("checkBoxStatus"),value = “Yes”;
this.getField("checkBoxStatus"),value = “On”;

this.getField("checkBoxStatus").isBoxChecked(1);

this.getField("checkBoxStatus").checkThisBox(0,true);

It's my first time trying that so I'm looking throught Internet but I can't find the right way!

Thanks for your help!