function checkWholeForm(EnquiryForm) {
	var why = "";

		why += isEmpty(EnquiryForm.first_name.value, "FIRST NAME");
		if (why != "") {
			alert(why);
			EnquiryForm.first_name.focus();
			return false;
		}
		why += isEmpty(EnquiryForm.last_name.value, "LAST NAME");
		if (why != "") {
			alert(why);
			EnquiryForm.last_name.focus();
			return false;
		}
		why += checkPhone(EnquiryForm.best_phone.value, "BEST PHONE NUMBER");
		if (why != "") {
			alert(why);
			EnquiryForm.best_phone.focus();
			return false;
		}
		why += checkEmail(EnquiryForm.email.value, "EMAIL ADDRESS");
		if (why != "") {
		alert(why);
		EnquiryForm.email.focus();
		return false;
		}

	return true;
}



// email

function checkEmail (strng) {
var error="";
if (strng == "") {
   error = "You didn't enter an email address.\n";
}

    var emailFilter=/^.+@.+\..{2,3}$/;
    if (!(emailFilter.test(strng))) { 
       error = "Please enter a valid email address.\n";
    }
    else {
//test email for illegal characters
       var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
         if (strng.match(illegalChars)) {
          error = "The email address contains illegal characters.\n";
       }
    }
return error;    
}


// phone number - strip out delimiters and check for 10 digits

function checkPhone (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a phone number.\n";
}

var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) {
       error = "The phone number contains illegal characters.";
  
    }
    if (!(stripped.length == 10)) {
	error = "The phone number is the wrong length. Make sure you included an area code.\n";
    } 
return error;
}

// non-empty textbox

function isEmpty(strng, fldName) {
var error = "";
  if (strng.length == 0) {
     error = "The " + fldName + " field has not been filled in.\n"
  }
return error;	  
}

// was textbox altered

function isDifferent(strng) {
var error = ""; 
  if (strng != "Can\'t touch this!") {
     error = "You altered the inviolate text area.\n";
  }
return error;
}