I am trying to program an ego depletion task in which participants must 'cross out' all occurrences of the letter 'e' in a paragraph of text. I want them to be able to click on letters in the text and the letter turn green; if they click it again, I would like the text to turn back to black. I found this forum (http://www.millisecond.com/forums/Topic7396.aspx) which helped some, but this programs the entire word to turn green... I need the individual letters to turn green.
Any help on how to achieve this would be greatly appreciated!