function gn()
{
if(document.all("tb1").style.display=="none")
	document.all("tb1").style.display="block";
else
	document.all("tb1").style.display="none";
	
	}
function onlyNum()
{
 if ( !(window.event.keyCode >= 48 && window.event.keyCode <= 57) )
 {
  window.event.keyCode = 0 ;
 }
}
Itemarray=new Array(new Array(1, 0, 0),new Array(2, 0, 0),new Array(3, 0, 0),new Array(4, 0, 0),new Array(5, 0, 0),new Array(6, 0, 0),
 new Array(7, 0, 0),new Array(8, 0, 0),new Array(9, 0, 0),new Array(10, 1, 15.6),new Array(11, 1, 15.6),new Array(12, 1, 15.6),new Array(13, 1, 15.6),
 new Array(14, 1, 15.6),new Array(15, 1, 15.6),new Array(16, 1, 15.6),new Array(17, 1, 15.6),new Array(18, 1, 15.6),new Array(19, 1, 15.6),new Array(20, 2, 31.2),
 new Array(21, 2, 31.2),new Array(22, 2, 31.2),new Array(23, 2, 31.2),new Array(24, 2, 31.2),new Array(25, 2, 31.2),new Array(26, 3, 46.8),new Array(27, 3, 46.8),
 new Array(28, 3, 46.8),new Array(29, 3, 46.8),new Array(30, 4, 62.4),new Array(31, 4, 62.4),new Array(32, 4, 62.4),new Array(33, 5, 78),new Array(34, 5, 78),
 new Array(35, 6, 93.6),new Array(36, 6, 93.6),new Array(37, 6, 93.6),new Array(38, 7, 109.2),new Array(39, 7, 109.2),new Array(40, 8, 124.8),new Array(41, 8, 124.8),
 new Array(42, 9, 140.4),new Array(43, 9, 140.4),new Array(44, 10, 156),new Array(45, 10, 156),new Array(46, 11, 171.6),new Array(47, 11, 171.6),new Array(48, 12, 187.2),
 new Array(49, 12, 187.2),new Array(50, 13, 202.8));
 function activate(form)
 {

  var beginlevel = document.thisformonly.beginlevel.value;
  var endlevel = document.thisformonly.endlevel.value;
 // document.thisformonly.ts.value="Order here and get free bonus!";
  if ((beginlevel == "") | (endlevel == "")) {alert("please enter your start and target level");return false;}
  beginlevel = beginlevel*1;
  endlevel = endlevel*1; // convert string to number
  if (beginlevel  > endlevel){alert("Target level must be greater than start level.");return false;}
  if ( endlevel  > 50 ){alert("Your levels must be between 1 and 50.");return false;}
   var price = 0;
  var totalHours = 0;
  var cjia=0;


totalHours=Itemarray[endlevel-1][1]-Itemarray[beginlevel-1][1];
price=Itemarray[endlevel-1][2]-Itemarray[beginlevel-1][2];
price=Math.ceil(price);
if(totalHours==0)totalHours=1;
totalHours=Math.ceil(totalHours);
if(price==0) price=35;
 

  document.thisformonly.price.value  =  price;
 

  document.thisformonly.totaltime.value = totalHours;
  
  
 }