Javascript TextBoxInput from function change value

Question

I have a problem. This fuction recive a textboxInput, (is called by two textbox), and I want to replace the user text with my restrictions. but I dont know how to replace the textbox to the textBoxInput

    function validarRutPromise(textBoxInput) {
        var textBox = textBoxInput.value; // the string in the textBoxInput
        alert(textBox); 
        textBox = textBox.toUpperCase();
        textBox = textBox.replace(".", "");
        textBox = textBox.replace(".", "");
        textBox = textBox.replace("-", "");
        textBoxInput.value(textBox); --- This line doesnt work!

Im reading, but document.getElementById, or document.getElementByName doesnt match because, my textBoxInput have a dinamical name

and Y call the function by:

Answer 1

value isn't a function, it's a property. Just assign it like you would any variable:

textBoxInput.value = textBox;

Aside:

You can simplify your replace() calls with RegEx:

textBox = textBox.replace(/[-\.]+/, "");