Grey text in Textbox

Grey text in Textbox

  
If you look at the following URL http://www.outsystems.com/NetworkForums/Forum_Home.aspx

There is a search textbox under the menu, inside this search textbox contain the following grey text "Have questions? ......type them here.." . when the user clicks on the textbox the grey text box disappears, the user is then able to type in the search term.

What was done to provide this type of behavior?

from the richwidgets extension use the input_setprompt webblock