function update_tip_pos(n){
switch(n)
{
case 1:
  X=200;
  Y=70;
  break;    
case 2:
  X=170;
  Y=160;
  break;
case 3:
  X=310;
  Y=100;
  break;
case 4:
  X=270;
  Y=160;
  break;
case 5:
  X=350;
  Y=200;
  break;
case 6:
  X=410;
  Y=192;
  break;
case 7:
  X=30;
  Y=280;
  break;
case 8:
  X=240;
  Y=270;
  break;
case 9:
  X=410;
  Y=240;
  break;
case 10:
  X=80;
  Y=340;
  break;
case 11:
  X=90;
  Y=410;
  break; 
case 12:
  X=370;
  Y=390;
  break; 
case 13:
  X=130;
  Y=120;
  break; 
}

document.getElementById('Tip'+n).style.left = X+'px';
document.getElementById('Tip'+n).style.top  = Y+'px';
}

function show_tip(num)
{
	tip_num=num;
	if (document.getElementById('Tip'+tip_num).innerHTML=='') {return}
	update_tip_pos(tip_num);
	tip_active = 1;
	document.getElementById('Tip'+tip_num).style.visibility = "visible";
}
function hide_tip(num)
{
	tip_num=num;
	document.getElementById('Tip'+tip_num).style.visibility = "hidden";
}