function Hi(elm) {
  document.getElementById(elm).style.background = '#fff';
  return;
 }

 function No(elm) {
  colors = new Array();
    colors['m1'] = '#fef600';
    colors['m2'] = '#ffe400';
    colors['m3'] = '#ffd800';
    colors['m4'] = '#ffc600';
    colors['m5'] = '#ffb400';
    colors['m6'] = '#ffa800';
    colors['m7'] = '#ff9800';
    colors['m8'] = '#ff8800';
    colors['m9'] = '#ff7800';

  document.getElementById(elm).style.background = colors[elm];
 }