function SetOpacity(fmObj, opacity) {
  if(fmObj) {
    fmObj.style.opacity = opacity / 100;
    fmObj.style.MozOpacity = opacity / 100;
    fmObj.style.KhtmlOpacity = opacity / 100;
    fmObj.style.filter = 'alpha(opacity=' + opacity + ')';
  }
}