function calculate_form(){
	
	var type = document.calculator_form.type.options[document.calculator_form.type.options.selectedIndex].value;
	var daylight = document.calculator_form.daylight.options[document.calculator_form.daylight.options.selectedIndex].value;
	var number = document.calculator_form.number.value;
	var hrs = document.calculator_form.hrs.value;
	var pence = document.calculator_form.pence.value;
	//alert(type+","+ daylight+","+ number+","+ hrs+","+ pence);
	var lighting = parseInt(type)*parseInt(number);
	var total = lighting/1000;
	//document.getElementById('lighting').innerHTML = "Lighting Load in Watts: " + lighting + " W";
	//document.getElementById('totallighting').innerHTML = "Total Lighting Load Watts: " + total + " W";
	$('#calc_load').load('step2.php?type='+ type +'&daylight='+ daylight +'&number='+ number +'&hrs='+ hrs +'&pence='+ pence +'&lighting='+ lighting +'&total='+ total);
	return false;
}

function info(id){
	i = document.getElementById(id).style.display
	if(i == "none"){
		document.getElementById(id).style.display = "";
	} else {
		document.getElementById(id).style.display = "none";	
	}
}

function valform(){
	var security = document.contact.security.value;
	var email = document.contact.email.value;
	var postcode = document.contact.postcode.value;
	var name = document.contact.name.value;
	
	if(security == ''){
		document.getElementById('security_err').style.display='';
		var securitydisp = 0;
	}else if(security != ''){
		document.getElementById('security_err').style.display='none';
		var securitydisp = 1;
	}
	
	if(email == ''){
		document.getElementById('email_err').style.display='';
		var emaildisp = 0;
	}else if(email != ''){
		document.getElementById('email_err').style.display='none';
		var emaildisp = 1;
	}
	if(postcode == ''){
		document.getElementById('postcode_err').style.display='';
		var postcodedisp = 0;
	}else if(postcode != ''){
		document.getElementById('postcode_err').style.display='none';
		var postcodedisp = 1;
	}
	
	if(name == ''){
		document.getElementById('name_err').style.display='';
		var namedisp = 0;
	}else if(name != ''){
		document.getElementById('name_err').style.display='none';
		var namedisp = 1;
	}
	
	if(securitydisp == 1 && emaildisp == 1 && namedisp == 1 && postcodedisp == 1){
		document.contact.submit();
	}else{
		return false;
	}

}