var box_focus_style               = "font-weight: bold;";
var box_blur_style                = "font-weight: normal;";
function span_focus(element) {
  if (document.all && document.all(element)) {
    
    document.all(element).style.cssText=box_focus_style;
  }

}

function span_blur(element) {
  if (document.all && document.all(element)) {
    document.all(element).style.cssText=box_blur_style;
  }

}