edButtons[edButtons.length] = new edButton('one_half', 'col 1/2', ' [one_half] ',' [/one_half] ','');
edButtons[edButtons.length] = new edButton('one_half_last', 'col 1/2 last', ' [one_half last=last] ',' [/one_half] ','');
edButtons[edButtons.length] = new edButton('one_third', 'col 1/3', ' [one_third] ',' [/one_third] ','');
edButtons[edButtons.length] = new edButton('one_third_last', 'col 1/3 last', ' [one_third last=last] ',' [/one_third] ','');
edButtons[edButtons.length] = new edButton('one_fourth', 'col 1/4', ' [one_fourth] ',' [/one_fourth] ','');
edButtons[edButtons.length] = new edButton('one_fourth_last', 'col 1/4 last', ' [one_fourth last=last] ',' [/one_fourth] ','');
edButtons[edButtons.length] = new edButton('two_third', 'col 2/3', ' [two_third] ',' [/two_third] ','');
edButtons[edButtons.length] = new edButton('two_third_last', 'col 2/3 last', ' [two_third last=last] ',' [/two_third] ','');
edButtons[edButtons.length] = new edButton('three_fourth', 'col 3/4', ' [three_fourth] ',' [/three_fourth] ','');
edButtons[edButtons.length] = new edButton('three_fourth_last', 'col 3/4 last', ' [three_fourth last=last] ',' [/three_fourth] ','');
edButtons[edButtons.length] = new edButton('clear', 'clear', '[clear]','','-1');