// validate Field Trip Application Request Form ----------------------------------------------------

function validate(form) {
	
	var isValid = true;
	var errormsg = "Please correct the following errors: \n";
	
	var fname = form.fname.value; 
	if (fname == "")
	{
		errormsg = errormsg + "\n" + "Please enter your first name.";
		isValid = false;
	}
	
	var lname = form.lname.value; 
	if (lname == "")
	{
		errormsg = errormsg + "\n" + "Please enter your last name.";
		isValid = false;
	}  
	
	var organization = form.organization.value; 
	if (organization == "")
	{
		errormsg = errormsg + "\n" + "Please enter a school name or organization.";
		isValid = false;
	}
	
	var street = form.street.value; 
	if (street == "")
	{
		errormsg = errormsg + "\n" + "Please enter a street address.";
		isValid = false;
	}
	
	var city = form.city.value; 
	if (city == "")
	{
		errormsg = errormsg + "\n" + "Please enter a city."
		isValid = false;
	}
	
	if (form.state.selectedIndex == 0)
	{
		errormsg = errormsg + "\n" + "Please select a state."
		isValid = false;
	}
	
	var zip = form.zip.value; 
	if (zip == "")
	{
		errormsg = errormsg + "\n" + "Please enter a zip code."
		isValid = false;
	}
	
	if (form.vc.selectedIndex == 0)
	{
		errormsg = errormsg + "\n" + "Please select a park."
		isValid = false;
	}	
	
	var email = form.email.value;  
	if (email == "" && form.copy.checked)
	{
		errormsg = errormsg + "\n" + "Please enter an email address."
		isValid = false;
	}
	
  // check email address
	var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
	var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; // valid
	
	var email = form.email.value; // email string
	if (email != "")
	{
	  if (!reg1.test(email) && reg2.test(email))  // if syntax is valid
		isValid = isValid;
	  else 
	  {
		errormsg = errormsg + "\n" + "\"" + email + "\" is an invalid e-mail address."
		isValid = false;
	  }
	}
	
/*  
  var cfemail = form.cfemail.value; 
  if (cfemail == "")
  {
  	errormsg = errormsg + "\n" + "Please enter your confirm email address"
  	isValid = false;
  }else{
	  if (email != cfemail)
	    {
			errormsg = errormsg + "\n" + "Your email address and confirm email address do not match. Please re-enter your email address" 
			isValid = false;
		}
  }
  
*/
  
	if (!isValid)
	alert(errormsg); // this is also optional
	return isValid;

}

// -->