dimmed text to introduce the form control

I would like to initialize the form controls with text that introduce the user what she should input.
Usually such a text is dimmed.

For example: the form includes dropdown control to select a country - I would like to initialize the select control with the dimmed text “Select country”, of course that text is not one of the select options.

Is it supported by dhtmlx?

Attach the picture, as though you wanted, that it looked like. I think we can help you.