function checkformBusiness ( form )
{
    if (form.acctname.value == "") {
	alert( "Please enter your Account Name." );
	form.acctname.focus();
	return false ;
    }				
								
    if (form.street1.value == "") {
	alert( "Please enter your business street address." );
	form.street1.focus();
	return false ;
    }
			  
    if (form.city.value == "") {
	alert( "Please enter your city." );
	form.city.focus();
	return false ;
    }
			  
    if (form.zip.value == "") {
	alert( "Please enter your zip code." );
	form.zip.focus();
	return false ;
    }
			  
    if (form.phone.value == "") {
	alert( "Please enter your Phone Number." );
	form.phone.focus();
	return false ;
    }		
			  			  				
    if (form.emc_accnt.value == "") {
	alert( "Please enter your EMC Account Number." );
	form.emc_accnt.focus();
	return false ;
    }		
								
    if (form.email.value == "") {
	alert( "Please enter your email address." );
	form.email.focus();
	return false ;
    }
			  
    if (!form.agree.checked) {
	alert( "Please agree to the terms in order to process your request." );
	form.agree.focus();
	return false ;
    }
    return true ;
}
			   		
   		
function custom(form)
{
    //Calculate Natural Gas Tons of CO2/Year

			
    var customtons = 	    parseFloat(form.customtons.value, 10);
    var dollaroffset;
    var acresoffset;
			
    dollaroffset = customtons * 0.50;
    acresoffset = customtons / 4;
    form.dollaroffset.value = dollaroffset.toFixed(2);
    form.acresoffset.value = acresoffset.toFixed(2);

}

function temp(form)
{
    //VAR BLOCK

    var electricity = parseFloat(form.electricity.value, 10);
    var gas = 	    parseFloat(form.gas.value, 10);
    var propane =     parseFloat(form.propane.value, 10);
    var vehicle =     parseFloat(form.vehicle.value, 10);
    var vehicle2 =    parseFloat(form.vehicle2.value, 10);
    var vehiclempg =  parseFloat(form.vehiclempg.value, 10);
    var vehicle2mpg = parseFloat(form.vehicle2mpg.value, 10);

    var car;
    var car2;
    var elec;
    var natural;
    var propaneTotal;
    var credits;


    if(isNaN(electricity)){
	electricity = 0;
    }

    if(isNaN(gas)){
	gas = 0;
    }

    if(isNaN(propane)){
	propane = 0;
    }

    if(isNaN(vehicle)){
	vehicle = 0;
    }

    if(isNaN(vehicle2)){
	vehicle2 = 0;
    }
    if(isNaN(vehiclempg)){
	vehiclempg = 0;
    }

    if(isNaN(vehicle2mpg)){
	vehicle2mpg = 0;
    }
				

    //Calculate Electricity Usage Tons of CO2/Year
			  		  
    elec = (electricity * 1.37/2000);
    form.electricityTons.value = elec.toFixed(2);		   

    //Calculate Natural Gas Tons of CO2/Year
			  
    natural = (gas * 11.71/2000);
    form.gasTons.value = natural.toFixed(2);

    //Calculate Propane Tons of CO2/Year
			  	
    propaneTotal = (propane * 12.67/2000);
    form.propaneTons.value = propaneTotal.toFixed(2);

    //Calculate Car1 Tons of CO2/Year

    if ((vehicle != 0) && (vehiclempg == 0)){
	vehiclempg = 20.2;
    }

    car = ((vehicle/vehiclempg) * 19.56)/2000;

    if(isNaN(car)){
	car = 0;
    }

    form.carTons.value = car.toFixed(2);

    //Calculate Car2 Tons of CO2/Year

    if ((vehicle2 != 0) && (vehicle2mpg == 0)){
	vehicle2mpg = 20.2;
    }

    car2 = ((vehicle2/vehicle2mpg) * 22.2)/2000;

    if(isNaN(car2)){
	car2 = 0;
    }

    form.carTons2.value = car2.toFixed(2);


    //Calculate Carbon offsets we recommend you donate
			  
    credits =  elec + natural + propaneTotal + car + car2;

    form.credits.value = credits.toFixed(2);

}