// JavaScript Document

function calcheat(){
heat.cf1.value = ( heat.l1.value * heat.w1.value * heat.h1.value );
if (heat.cf1.value==0) heat.cf1.value="";
heat.btuhr1.value = ( heat.cf1.value * 5 );
if (heat.tb1.checked) {
  heat.btuhr1.value = (heat.btuhr1.value * 1.1)
  }
heat.btuhr1.value=roundNumber(heat.btuhr1.value);
if (heat.btuhr1.value==0) heat.btuhr1.value=""; 

heat.cf2.value = ( heat.l2.value * heat.w2.value * heat.h2.value );
if (heat.cf2.value==0) heat.cf2.value="";
heat.btuhr2.value = ( heat.cf2.value * 5 );
if (heat.tb2.checked) {
  heat.btuhr2.value = (heat.btuhr2.value * 1.1)
  }
heat.btuhr2.value=roundNumber(heat.btuhr2.value); 
if (heat.btuhr2.value==0) heat.btuhr2.value=""; 

heat.cf3.value = ( heat.l3.value * heat.w3.value * heat.h3.value );
if (heat.cf3.value==0) heat.cf3.value="";
heat.btuhr3.value = ( heat.cf3.value * 5 );
if (heat.tb3.checked) {
  heat.btuhr3.value = (heat.btuhr3.value * 1.1)
  }
heat.btuhr3.value=roundNumber(heat.btuhr3.value); 
if (heat.btuhr3.value==0) heat.btuhr3.value=""; 

heat.cf4.value = ( heat.l4.value * heat.w4.value * heat.h4.value );
if (heat.cf4.value==0) heat.cf4.value="";
heat.btuhr4.value = ( heat.cf4.value * 5 );
if (heat.tb4.checked) {
  heat.btuhr4.value = (heat.btuhr4.value * 1.1)
  }
heat.btuhr4.value=roundNumber(heat.btuhr4.value); 
if (heat.btuhr4.value==0) heat.btuhr4.value=""; 

heat.cf5.value = ( heat.l5.value * heat.w5.value * heat.h5.value );
if (heat.cf5.value==0) heat.cf5.value="";
heat.btuhr5.value = ( heat.cf5.value * 5 );
if (heat.tb5.checked) {
  heat.btuhr5.value = (heat.btuhr5.value * 1.1)
  }
heat.btuhr5.value=roundNumber(heat.btuhr5.value); 
if (heat.btuhr5.value==0) heat.btuhr5.value=""; 

heat.cf6.value = ( heat.l6.value * heat.w6.value * heat.h6.value );
if (heat.cf6.value==0) heat.cf6.value="";
heat.btuhr6.value = ( heat.cf6.value * 4 );
if (heat.tb6.checked) {
  heat.btuhr6.value = (heat.btuhr6.value * 1.1)
  }
heat.btuhr6.value=roundNumber(heat.btuhr6.value); 
if (heat.btuhr6.value==0) heat.btuhr6.value=""; 

heat.cf7.value = ( heat.l7.value * heat.w7.value * heat.h7.value );
if (heat.cf7.value==0) heat.cf7.value="";
heat.btuhr7.value = ( heat.cf7.value * 4 );
if (heat.tb7.checked) {
  heat.btuhr7.value = (heat.btuhr7.value * 1.1)
  }
heat.btuhr7.value=roundNumber(heat.btuhr7.value);
if (heat.btuhr7.value==0) heat.btuhr7.value=""; 

heat.cf8.value = ( heat.l8.value * heat.w8.value * heat.h8.value );
if (heat.cf8.value==0) heat.cf8.value="";
heat.btuhr8.value = ( heat.cf8.value * 4 );
if (heat.tb8.checked) {
  heat.btuhr8.value = (heat.btuhr8.value * 1.1)
  }
heat.btuhr8.value=roundNumber(heat.btuhr8.value);
if (heat.btuhr8.value==0) heat.btuhr8.value=""; 

heat.cf9.value = ( heat.l9.value * heat.w9.value * heat.h9.value );
if (heat.cf9.value==0) heat.cf9.value="";
heat.btuhr9.value = ( heat.cf9.value * 4 );
if (heat.tb9.checked) {
  heat.btuhr9.value = (heat.btuhr9.value * 1.1)
  }
heat.btuhr9.value=roundNumber(heat.btuhr9.value);
if (heat.btuhr9.value==0) heat.btuhr9.value=""; 

heat.cf10.value = ( heat.l10.value * heat.w10.value * heat.h10.value );
if (heat.cf10.value==0) heat.cf10.value="";
heat.btuhr10.value = ( heat.cf10.value * 4 );
if (heat.tb10.checked) {
  heat.btuhr10.value = (heat.btuhr10.value * 1.1)
  }
heat.btuhr10.value=roundNumber(heat.btuhr10.value);
if (heat.btuhr10.value==0) heat.btuhr10.value=""; 

heat.cf11.value = ( heat.l11.value * heat.w11.value * heat.h11.value );
if (heat.cf11.value==0) heat.cf11.value="";
heat.btuhr11.value = ( heat.cf11.value * 4 );
if (heat.tb11.checked) {
  heat.btuhr11.value = (heat.btuhr11.value * 1.1)
  }
heat.btuhr11.value=roundNumber(heat.btuhr11.value);
if (heat.btuhr11.value==0) heat.btuhr11.value=""; 

heat.cf12.value = ( heat.l12.value * heat.w12.value * heat.h12.value );
if (heat.cf12.value==0) heat.cf12.value="";
heat.btuhr12.value = ( heat.cf12.value * 4 );
if (heat.tb12.checked) {
  heat.btuhr12.value = (heat.btuhr12.value * 1.1)
  }
heat.btuhr12.value=roundNumber(heat.btuhr12.value);
if (heat.btuhr12.value==0) heat.btuhr12.value=""; 

heat.cf13.value = ( heat.l13.value * heat.w13.value * heat.h13.value );
if (heat.cf13.value==0) heat.cf13.value="";
heat.btuhr13.value = ( heat.cf13.value * 4 );
if (heat.tb13.checked) {
  heat.btuhr13.value = (heat.btuhr13.value * 1.1)
  }
heat.btuhr13.value=roundNumber(heat.btuhr13.value);
if (heat.btuhr13.value==0) heat.btuhr13.value=""; 

heat.cf14.value = ( heat.l14.value * heat.w14.value * heat.h14.value );
if (heat.cf14.value==0) heat.cf14.value="";
heat.btuhr14.value = ( heat.cf14.value * 4 );
if (heat.tb14.checked) {
  heat.btuhr14.value = (heat.btuhr14.value * 1.1)
  }
heat.btuhr14.value=roundNumber(heat.btuhr14.value);
if (heat.btuhr14.value==0) heat.btuhr14.value=""; 

heat.cf15.value = ( heat.l15.value * heat.w15.value * heat.h15.value );
if (heat.cf15.value==0) heat.cf15.value="";
heat.btuhr15.value = ( heat.cf15.value * 4 );
if (heat.tb15.checked) {
  heat.btuhr15.value = (heat.btuhr15.value * 1.1)
  }
heat.btuhr15.value=roundNumber(heat.btuhr15.value);
if (heat.btuhr15.value==0) heat.btuhr15.value=""; 

heat.cf16.value = ( heat.l16.value * heat.w16.value * heat.h16.value );
if (heat.cf16.value==0) heat.cf16.value="";
heat.btuhr16.value = ( heat.cf16.value * 4 );
if (heat.tb16.checked) {
  heat.btuhr16.value = (heat.btuhr16.value * 1.1)
  }
heat.btuhr16.value=roundNumber(heat.btuhr16.value);
if (heat.btuhr16.value==0) heat.btuhr16.value=""; 

var stot=roundNumber((heat.btuhr1.value * 1) + (heat.btuhr2.value * 1) + (heat.btuhr3.value * 1) + (heat.btuhr4.value * 1) + (heat.btuhr5.value * 1) + (heat.btuhr6.value * 1) + (heat.btuhr7.value * 1) + (heat.btuhr8.value * 1) + (heat.btuhr9.value * 1) + (heat.btuhr10.value * 1) + (heat.btuhr11.value * 1) + (heat.btuhr12.value * 1) + (heat.btuhr13.value * 1) + (heat.btuhr14.value * 1) + (heat.btuhr15.value * 1) + (heat.btuhr16.value * 1));

var tot = roundNumber((heat.wcyl.value * 10000) + stot);
heat.cylbtu.value = (heat.wcyl.value * 10000);
if (heat.cylbtu.value==0) heat.cylbtu.value=""; 

heat.btuhr_total.value = tot;

}





function roundNumber(myvalue) {
	var numberField = myvalue; // Field where the number appears
	var rlength = 2; // The number of decimal places to round to
	var newnumber = Math.round(numberField*Math.pow(10,rlength))/Math.pow(10,rlength);
	return newnumber;
}

function printWindow(){
bV = parseInt(navigator.appVersion)
if (bV >= 4) window.print()
}

function MM_callJS(jsStr) { //v2.0
  return eval(jsStr)
}