<!--: hide JavaScript from old browsers

var bigFootIDa = 0;
var BestDeckSitea = 0;
var bestdecksitea = 0;
var Bestdecksitea = 0;
var bEstdecksitea = 0;
var beStdecksitea = 0;
var besTdecksitea = 0;
var bestDecksitea = 0;
var bestdEcksitea = 0;
var bestdeCksitea = 0;
var bestdecKsitea = 0;
var bestdeckSitea = 0;
var bestdecksItea = 0;
var bestdecksiTea = 0;
var bestdecksitEa = 0;
var BEstdecksitea = 0;


function findVolumea() {
	
	with (window.document.concreteForma) {
		
		
		beSTdecksitea = (parseFloat(tube_dFeet.value) + (parseFloat(tube_dInches.value) / 12)) / 2;
		bestdecksiTea = parseFloat(tube_hFeet.value) + (parseFloat(tube_hInches.value) / 12);
	
		beStdecksitea = parseFloat(bigFootIDa.options[window.document.concreteForma.bigFootIDa.selectedIndex].value);

		bEstdecksitea = (bestdecksiTea * Math.PI * (Math.pow(beSTdecksitea ,2))) * parseFloat(numEachTube.value);

		bestdecksitEa = (Math.round((beStdecksitea + besTdecksitea + bEstdecksitea) * 100)) / 100;
		BEstdecksitea = Math.round(((beStdecksitea + besTdecksitea + bEstdecksitea) / 27) * 100) / 100;
		
		if (dataChecka() == 1) {		
			cubicFeeta.value = bestdecksitEa;
			cubicYardsa.value = BEstdecksitea;
			bags60a.value = (Math.ceil(beStdecksitea * bestdecksitEa));
			
		}
		
	}	
}
		

function dataChecka() {
  with (window.document.concreteForma) {

  BestDeckSitea = 1; 

  if (BEstdecksitea > 1000000) {
	alert("Results are too large to display.");
	cubicFeeta.value = 0;
	cubicYardsa.value = 0;
	bags60a.value = 0;
	bags80a.value = 0;
	BestDeckSitea = 0;
	}

  
  if ((bEstdecksitea == 0 & numEachTube.value !=0) || (bEstdecksitea == 0 & (beSTdecksitea != 0 || bestdecksiTea != 0))) {
	alert("Please check the sonotube values.\nYou've forgotten to enter in dimensions or the number of sonotubes.");
	BestDeckSitea = 0;
	}

  return (BestDeckSitea);
  }
}


function clearAlla() {
 with (window.document.concreteForma) {
 	
 	tube_dFeet.value = 0;
 	tube_dInches.value = 0;
 	tube_hFeet.value = 0;
 	tube_hInches.value = 0;
	
	bigFootIDa.selectedIndex = 0;
	
	
	numEachTube.value = 0;
	cubicFeeta.value = 0;
	cubicYardsa.value = 0;
	bags60a.value = 0;
	
	}
}


function clearBoxa(boxObject) {
	boxObject.value = "";
}


function inputChecka(boxObject) {


	if (boxObject.value != "") {  
	
		if ((boxObject.value != Math.floor(boxObject.value)) || ((Math.floor(boxObject.value)) < 0)) {
		alert('Lengths must be positive integers like 1,2,3....');
		boxObject.value = 0;
		}
	}
	else boxObject.value = 0;
}


function denyChangea() {

	alert("The value in this box may not be changed.");
}


// end hiding JavaScript -->