How do i edit this javascript - to show black text when first initial typing of text field?

Hi All,

Need some help here!

I have got a javascript from a forum previously. The purpose of the script is to have a watermark text (grey colour) in the text field box that will hide upon typing. When typing or after data in keyed in, the text should appear full black. The problem with my current script is that when first initial typing of the text, the text is grey colour and only turn full black when exit. How do i keep the watermark in grey, when typing shows black colour text, and black colour text data after input?

The script is such:

var message = 'DD'

if (event.value == '') {

    event.target.display = display.noPrint

    event.value = message

event.target.textColor = ["G",0.8] ;

} else {

    event.target.display = display.visible

if (event.target.value==event.target.defaultValue) event.target.value = "";

event.target.textColor = ["G",0] ;

}

Thanks!