text box Required

[HeadRog]

I have this code on a drop-down in Designer

How do I make the text box (txtBox) Required when it’s visible?

form1.#subform[0].Soft_Title::exit - (JavaScript, client)

//app.alert(this.rawValue);

if(this.rawValue==42){

    txtBox.presence = "visible";

}else{//Yes

    txtBox.presence =  "hidden";

    }

[try67]

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