function validateEmpty(fld) {
	var error = "";
	if (fld.value.length == 0) {
		fld.style.background = 'Yellow'; 
		error = "The required field: "+fld.name+" has not been filled in.\n"
	} else {
		fld.style.background = '#FFFFFF';
	}
	return error;  
}
function trim(s) {return s.replace(/^\s+|\s+$/, '');}
function validateEmail(fld) {
	var error="";
	var tfld = trim(fld.value);
	var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
	var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
	
	if (fld.value == "") {
		fld.style.background = 'Yellow';
		error = "You didn't enter an email address.\n";
	} else if (!emailFilter.test(tfld)) {
		fld.style.background = 'Yellow';
		error = "Please enter a valid email address.\n";
	} else if (fld.value.match(illegalChars)) {
		fld.style.background = 'Yellow';
		error = "The email address contains illegal characters.\n";
	} else {
		fld.style.background = '#FFFFFF;';
	}
	return error;
}
function validatePhone(fld) {
	var error = "";
	var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');    
	
	if (fld.value == "") {
		error = "You didn't enter a phone number.\n";
		fld.style.background = 'Yellow';
	} else if (isNaN(parseInt(stripped))) {
		error = "The phone number contains illegal characters.\n";
		fld.style.background = 'Yellow';
	} else if (!(stripped.length == 10)) {
		error = "The phone number is the wrong length. Make sure you included an area code.\n";
		fld.style.background = 'Yellow';
	}
	return error;
}