function floor(number) 
{
  return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}

function calculate()
{
  document.registration_form.people_registration_grand_total.value = 0

  if (document.registration_form.people_registration_received.value != 1)
  { document.registration_form.people_registration_received.value = 1; }
  document.registration_form.people_registration_received_total.value = floor(document.registration_form.people_registration_received.value * 210)

  if (document.registration_form.people_registration_family.value < 0)
  { document.registration_form.people_registration_family.value = 0; }
  document.registration_form.people_registration_family_total.value = floor(document.registration_form.people_registration_family.value * 170)

  if (document.registration_form.people_registration_children.value < 0)
  { document.registration_form.people_registration_children.value = 0; }
  document.registration_form.people_registration_children_total.value = floor(document.registration_form.people_registration_children.value * 170)

  if (document.registration_form.people_registration_free_children.value < 0)
  { document.registration_form.people_registration_free_children.value = 0; }
  document.registration_form.people_registration_free_children_total.value = floor(document.registration_form.people_registration_free_children.value * 0)

/* 
  if (document.registration_form.people_registration_baseball_game.value < 0)
  { document.registration_form.people_registration_baseball_game.value = 0; }
  document.registration_form.people_registration_baseball_game_total.value = floor(document.registration_form.people_registration_baseball_game.value * 10)
*/


  if (document.registration_form.people_registration_walk_run.value < 0)
  { document.registration_form.people_registration_walk_run.value = 0; }
  document.registration_form.people_registration_walk_run_total.value = floor(document.registration_form.people_registration_walk_run.value * 0)

  if (document.registration_form.people_registration_scholarship_donation.value < 0)
  { document.registration_form.people_registration_scholarship_donation.value = 0; }
  document.registration_form.people_registration_scholarship_donation_total.value = floor(document.registration_form.people_registration_scholarship_donation.value)

  document.registration_form.people_registration_grand_total.value = 
	floor(document.registration_form.people_registration_received_total.value) +
	floor(document.registration_form.people_registration_family_total.value) +
	floor(document.registration_form.people_registration_children_total.value) +
	floor(document.registration_form.people_registration_free_children_total.value) +
/*	floor(document.registration_form.people_registration_baseball_game_total.value) + */

	floor(document.registration_form.people_registration_walk_run_total.value) +
	floor(document.registration_form.people_registration_scholarship_donation_total.value)
}

function positive_pay()
{
  if (document.pay_online_form.price.value <= 0)
  { 
	document.pay_online_form.price.value = 0;
	alert("Payment amount must be positive.");
  }
}

function number_row() 
{
document.write("<tr bgcolor='#23408F'>");
document.write("<th style='font: 10pt arial, helvetica, sans serif; color: white;'>1</th>");
document.write("<th style='font: 10pt arial, helvetica, sans serif; color: white;'>2</th>");
document.write("<th style='font: 10pt arial, helvetica, sans serif; color: white;'>3</th>");
document.write("<th style='font: 10pt arial, helvetica, sans serif; color: white;'>4</th>");
document.write("<th style='font: 10pt arial, helvetica, sans serif; color: white;'>5</th>");
document.write("<th style='font: 10pt arial, helvetica, sans serif; color: white;'>6</th>");
document.write("</tr>");
}

function support_sessions_selection_friday()
{
document.write("<option value='--' selected>--</option>");
document.write("<option value='A'>A</option>");
document.write("<option value='B'>B</option>");
document.write("<option value='C'>C</option>");
document.write("<option value='D'>D</option>");
document.write("<option value='E'>E</option>");
document.write("<option value='F'>F</option>");
document.write("<option value='G'>G</option>");
document.write("<option value='H'>H</option>");
document.write("<option value='I'>I</option>");
document.write("<option value='J'>J</option>");
document.write("</select>");
}

function support_sessions_selection_saturday() 
{
document.write("<option value='--' selected>--</option>");
document.write("<option value='AA'>AA</option>");
document.write("<option value='BB'>BB</option>");
document.write("<option value='CC'>CC</option>");
document.write("<option value='DC'>DD</option>");
document.write("<option value='EE'>EE</option>");
document.write("<option value='FF'>FF</option>");
document.write("<option value='GG'>GG</option>");
document.write("<option value='HH'>HH</option>");
document.write("<option value='II'>II</option>");
document.write("<option value='JJ'>JJ</option>");
document.write("</select>");
}

function support_sessions_selection_sunday() 
{
document.write("<option value='--' selected>--</option>");
document.write("<option value='AA'>AA</option>");
document.write("<option value='BB'>BB</option>");
document.write("<option value='CC'>CC</option>");
document.write("<option value='DC'>DD</option>");
document.write("<option value='EE'>EE</option>");
document.write("<option value='FF'>FF</option>");
document.write("<option value='GG'>GG</option>");
document.write("<option value='HH'>HH</option>");
document.write("<option value='II'>II</option>");
document.write("<option value='JJ'>JJ</option>");
document.write("</select>");
}

function tshirt_selection_friday() 
{
document.write("<option value='--' selected>--</option>");
document.write("<option value='YS'>YS</option>");
document.write("<option value='YM'>YM</option>");
document.write("<option value='YL'>YL</option>");
document.write("<option value='AS'>AS</option>");
document.write("<option value='AM'>AM</option>");
document.write("<option value='AL'>AL</option>");
document.write("<option value='AX'>AX</option>");
document.write("</select>");
}