var nav = (document.layers); 
 var iex = (document.all);
 var skn = (nav) ? document.topdeck : topdeck.style;
 if (nav) document.captureEvents(Event.MOUSEMOVE);
 document.onmousemove = get_mouse;

 function pop(msg) {
 var content ="<table width=215 border=0 cellpadding=0 cellspacing=0><tr><td><img src=/main/sub/sub_lecture_title.gif width=215 height=51></td></tr><tr><td background=/main/sub/sub_lecture_bg.gif><table width=90% border=0 align=center cellpadding=5 cellspacing=0><tr><td height=5></td></tr><tr><td><font color=5A6D04>" + msg + "</font><br></td></tr></table></td></tr><tr><td><img src=/main/sub/sub_lecture_bottom.gif width=215 height=20></td></tr></table>";
  if (nav) { 
    skn.document.write(content); 
	  skn.document.close();
	  skn.visibility = "visible";
  }

    else if (iex) {
	  document.all("topdeck").innerHTML = content;
	  skn.visibility = "visible";  
  }
}

 function get_mouse(e) {
	var x = (nav) ? e.pageX : event.x+document.body.scrollLeft; 
	var y = (nav) ? e.pageY : event.y+document.body.scrollTop;
	skn.left = x - 80;
	skn.top  = y + 10;
}

 function off() {
  skn.visibility = "hidden";
}