function checkFields() {
	var errortext = ''; 
	var valid = true;
	if(checkAddressRegex()) {
		document.getElementById("row_email").style.background = "#ffffff";
	}
	else {
		valid = false;
		document.getElementById("row_email").style.background = "#ffefe0";
		errortext += "Enter a valid email address";
	}
	
	document.getElementById("errorblock").innerHTML = errortext;
	return valid;
}


function checkAddressRegex()
{
	var validRegex = /^[-a-zA-Z0-9][-a-zA-Z0-9\._]*[-a-zA-Z0-9]@[-a-zA-Z0-9][-a-zA-Z0-9]*[-a-zA-Z0-9\._]*\.[a-zA-Z0-9][a-zA-Z0-9]*$/
	var testString = new String;
	testString = document.getElementById("RegistrationForm").email.value;
	return !(testString.match(validRegex) == null);
}