Is there any way modify the text style (like bold) for an AW.Formats

I am interested in creating two string formats

var string = new AW.Formats.String;
var string_bold = new AW.Formats.String;

One will be bold, one not. I want to keep the bold status within the AW.Format as I am passing the cellFormat(s) and cellData into another program to convert the grid into an excel file (with the same formating) and I do not want to have to generate any additional data if it is not necessary.

I tried
string_bold.setStyle("font-weight", "bold");
string_bold.fontWeight='bold';

both did not work.

You can insert html tags into dataToText or valueToText methods -

string_bold.dataToText = function(data){
return "<b>" + data + "</b>";
}