tdouce · February 18, 2010 20:12
diff --git a/calculator_3 b/calculator_3
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
 <title>Untitled Document</title>
 <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
 <script type='text/javascript'>
 
 
 // returns true if the form is valid
 // returns false if the form is invalid

 function formValidator(){
 // Make quick references to our fields
 var roof = document.getElementById('txtRoof');
 var precip = document.getElementById('txtPrecip');
 var eff = document.getElementById('txtEff');
 var capt_area = document.getElementById('txtArea');
 
 // Check each input in the order that it appears in the form!
 if(isNumeric(roof, "Please enter a value for the roof area.")){
 if(isNumeric(precip, "Please enter a precipitation value.")){
 if(isNumeric(eff, "Please enter an efficiency value.")){
 if(isNumeric(capt_area, "Please enter a capture area value.")){
 return true;
 }
 }
 }
 }
 return false;
 }
 
 function notEmpty(elem, helperMsg){
 if(elem.value.length == 0){
 alert(helperMsg);
 elem.focus(); // set the focus to this input
 return false;
 }
 return true;
 }
 
 function isNumeric(elem, helperMsg){
 var numericExpression = /^[0-9]+$/;
 if(elem.value.match(numericExpression)){
 return true;
 }else{
 alert(helperMsg);
 elem.focus();
 return false;
 }
 }
 
 
 function calculate()
 {
 var roof = document.getElementById('txtRoof');
 var precip = document.getElementById('txtPrecip');
 var eff = document.getElementById('txtEff');
 var eff_percent = (eff/100);
 var conv_factr = 0.623;
 var capt_area = document.getElementById('txtArea');
 var capt_area_percent = (capt_area/100);
 var capt_area_percent = (capt_area/100);
 var total = (roof * precip * conv_factr * capt_area_percent * eff_percent);
 var total_rnd = Math.round(total);
 
 document.write("Approximately " + total_rnd + " gallons can be collected off your roof annualy.");
 
 }
 
 function processForm()
 {
  if(formValidator()) {
    calculate();
  }
 }
 
 </script>
 
 <body>
 <form>
 
 
 Collection Footprint Area (square feet) <input type='text' id='txtRoof' /><br />
 Annual precipitation in your area (inches) <input type='text' id='txtPrecip' /><br />
 Efficiency with which you are going <br/>to caputure rain (%)<input type='text' id='txtEff' /><br />
 The amount of roof area from which <br/> you are going to caputure rain (%) <input type='text' id='txtArea' /><br />
 
 <input type='submit' value='Check Form' onClick='processForm()'/>
 </form>
 </body>
 </html>
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
	"http://www.w3.org/TR/html4/loose.dtd">
	<html>
	<head>
	<title>Untitled Document</title>
	<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
	<script type='text/javascript'>


	// returns true if the form is valid
	// returns false if the form is invalid

	function formValidator(){
	// Make quick references to our fields
	var roof = document.getElementById('txtRoof');
	var precip = document.getElementById('txtPrecip');
	var eff = document.getElementById('txtEff');
	var capt_area = document.getElementById('txtArea');

	// Check each input in the order that it appears in the form!
	if(isNumeric(roof, "Please enter a value for the roof area.")){
	if(isNumeric(precip, "Please enter a precipitation value.")){
	if(isNumeric(eff, "Please enter an efficiency value.")){
	if(isNumeric(capt_area, "Please enter a capture area value.")){
	return true;
	}
	}
	}
	}
	return false;
	}

	function notEmpty(elem, helperMsg){
	if(elem.value.length == 0){
	alert(helperMsg);
	elem.focus(); // set the focus to this input
	return false;
	}
	return true;
	}

	function isNumeric(elem, helperMsg){
	var numericExpression = /^[0-9]+$/;
	if(elem.value.match(numericExpression)){
	return true;
	}else{
	alert(helperMsg);
	elem.focus();
	return false;
	}
	}


	function calculate()
	{
	var roof = document.getElementById('txtRoof');
	var precip = document.getElementById('txtPrecip');
	var eff = document.getElementById('txtEff');
	var eff_percent = (eff/100);
	var conv_factr = 0.623;
	var capt_area = document.getElementById('txtArea');
	var capt_area_percent = (capt_area/100);
	var capt_area_percent = (capt_area/100);
	var total = (roof * precip * conv_factr * capt_area_percent * eff_percent);
	var total_rnd = Math.round(total);

	document.write("Approximately " + total_rnd + " gallons can be collected off your roof annualy.");

	}

	function processForm()
	{
	if(formValidator()) {
	calculate();
	}
	}

	</script>

	<body>
	<form>


	Collection Footprint Area (square feet) <input type='text' id='txtRoof' /><br />
	Annual precipitation in your area (inches) <input type='text' id='txtPrecip' /><br />
	Efficiency with which you are going <br/>to caputure rain (%)<input type='text' id='txtEff' /><br />
	The amount of roof area from which <br/> you are going to caputure rain (%) <input type='text' id='txtArea' /><br />

	<input type='submit' value='Check Form' onClick='processForm()'/>
	</form>
	</body>
	</html>