var level = new Array(15);

level[0]  = 0.05;

level[1]  = 0.08;

level[2]  = 0.12;

level[3]  = 0.16;

level[4]  = 0.23;

level[5]  = 0.26;

level[6]  = 0.28;

level[7]  = 0.31;

level[8]  = 0.04;

level[9]  = 0.06;

level[10] = 0.08;

level[11] = 0.13;

level[12] = 0.18;

level[13] = 0.22;

level[14] = 0.26;

level[15] = 0.06;

level[16] = 0.09;

level[17] = 0.13;

level[18] = 0.17;

level[19] = 0.24;

level[20] = 0.27;

level[21] = 0.29;

level[22] = 0.32;

level[23] = 0.05;

level[24] = 0.07;

level[25] = 0.09;

level[26] = 0.14;

level[27] = 0.19;

level[28] = 0.23;

level[29] = 0.27;

function compute(form){

  var selectedLevel = level[form.limit.value]/100;

  if(form.limit.value<15)

  {

    var hands=form.hours.value*60;

  }

  if(form.limit.value>=15)

  {

    var hands=form.hours.value*80;

  }

  if(form.tables[0].checked==true)

  {

    var tables=form.tables[0].value;

  }

  if(form.tables[1].checked==true)

  {

    var tables=form.tables[1].value;

  }

  if(form.tables[2].checked==true)

  {

    var tables=form.tables[2].value;

  }

  if(form.tables[3].checked==true)

  {

    var tables=form.tables[3].value;

  }

  var amount        = (hands*selectedLevel*form.percent.value*(365 / 7 / 12)*tables);

  var roundedAmount = "$"+Math.round((amount*1000)/1000);

  if(roundedAmount=="$NaN")

  {

    document.getElementById("totalDaily").firstChild.nodeValue      = "$0";

    document.getElementById("totalWeekly").firstChild.nodeValue     = "$0";

    document.getElementById("totalMonthly").firstChild.nodeValue    = "$0";

    document.getElementById("totalYearly").firstChild.nodeValue     = "$0";

    document.getElementById("rakebackDaily").firstChild.nodeValue   = "$0";

    document.getElementById("rakebackWeekly").firstChild.nodeValue  = "$0";

    document.getElementById("rakebackMonthly").firstChild.nodeValue = "$0";

    document.getElementById("rakebackYearly").firstChild.nodeValue  = "$0";

  }

  else

  {

    var totalDaily      = hands*selectedLevel*tables*100/7;

    var totalWeekly     = totalDaily*7;

    var totalMonthly    = totalWeekly*4.345;

    var totalYearly     = totalMonthly*12;

    var rakebackDaily   = totalDaily*form.percent.value/100;

    var rakebackWeekly  = totalWeekly*form.percent.value/100;

    var rakebackMonthly = totalMonthly*form.percent.value/100;

    var rakebackYearly  = totalYearly*form.percent.value/100;

    totalDaily          = Math.round(totalDaily);

    totalWeekly         = Math.round(totalWeekly);

    totalMonthly        = Math.round(totalMonthly);

    totalYearly         = Math.round(totalYearly);

    rakebackDaily       = Math.round(rakebackDaily);

    rakebackWeekly      = Math.round(rakebackWeekly);

    rakebackMonthly     = Math.round(rakebackMonthly);

    rakebackYearly      = Math.round(rakebackYearly);

    document.getElementById("totalDaily").firstChild.nodeValue      = "$"+totalDaily;

    document.getElementById("totalWeekly").firstChild.nodeValue     = "$"+totalWeekly;

    document.getElementById("totalMonthly").firstChild.nodeValue    = "$"+totalMonthly;

    document.getElementById("totalYearly").firstChild.nodeValue     = "$"+totalYearly;

    document.getElementById("rakebackDaily").firstChild.nodeValue   = "$"+rakebackDaily;

    document.getElementById("rakebackWeekly").firstChild.nodeValue  = "$"+rakebackWeekly;

    document.getElementById("rakebackMonthly").firstChild.nodeValue = "$"+rakebackMonthly;

    document.getElementById("rakebackYearly").firstChild.nodeValue  = "$"+rakebackYearly

  }

}