var monta_o_f, monta_o_b, monta_c_f, monta_c_b;
if (window['monta_open_font']) {monta_o_f = monta_open_font;} else {monta_o_f = '#000';}
if (window['monta_open_back']) {monta_o_b = monta_open_back;} else {monta_o_b = '#fff';}
if (window['monta_close_font']) {monta_c_f = monta_close_font;} else {monta_c_f = '#000';}
if (window['monta_close_back']) {monta_c_b = monta_close_back;} else {monta_c_b = '#000';}
var sheet = document.styleSheets[0];
if(sheet.addRule){
  sheet.addRule(".monta_on", "cursor:pointer; background:"+monta_c_b+"; color:"+monta_c_f, 0);
  sheet.addRule(".monta_off", "cursor:pointer; background:"+monta_o_b+"; color:"+monta_o_f, 0);
}
if(sheet.insertRule){
  sheet.insertRule(".monta_on {cursor:pointer; background:"+monta_c_b+"; color:"+monta_c_f+"}", 0);
  sheet.insertRule(".monta_off {cursor:pointer; background:"+monta_o_b+"; color:"+monta_o_f+"}", 0);
}
var montas = document.getElementsByTagName('span');
for (var i = 0;i < montas.length;i++) {
  if (montas[i].className != 'monta_on' &&
      montas[i].className != 'monta_off' ) {continue;}

  montas[i].onclick = function onlick (event) {
    if (this.className == 'monta_off')
        this.className = 'monta_on';
    else
        this.className = 'monta_off';
  }
}