Setting tabs with Word-Plugin 1.1.1

When I loop textlines with tabs in a textglobal and I replace a bookmark with the textglobal, the tabs in Word are shown as ‘\t’ instead of being a real tab.
Any idea how I can do this right?

This is my method:

	var size = facturen_to_factuurregels.getSize();
	globals.regels = "";

	if(size > 0)
	{
		for(var i = 1 ; i<= size ; i++)
		{
		var record = facturen_to_factuurregels.getRecord(i);
		globals.regels += facturen_to_factuurregels.omschrijving + ' \t' + facturen_to_factuurregels.perstuk + ' \t' + facturen_to_factuurregels.aantal + ' \t' + facturen_to_factuurregels.bedrag + '\n';
		}
	plugins.it2be_word.replaceBookmark("regels", globals.regels);	
	}

The text in Word is shown as:

A4 Kopieerpapier \t0.1 \t \t30
A4 Kopieerpapier \t0.1 \t \t30
A4 Kopieerpapier \t0.1 \t \t30

(I know the number formatting is still not right, but that doesn’t matter for now)