// JavaScript Document <script language="javascript" type="text/javascript">

function validForm(form) {
	var email = form.emailaddress.value;
	if (email == "") 
	{ 
		alert("Please enter your email address");
		form.emailaddress.focus();
		return false;
	}
	else if (isValidEmail(email) == false) 
	{
		alert("Your email address is invalid!");
		form.emailaddress.focus();
		return false;
	} 
	else
	{
		return true;
	}
}


function isValidEmail(email) {
	
	var locA = email.indexOf("@");
	var locD = email.indexOf(".");
	var len = email.length;
	
	if (locA == -1 || locA == 0 || locA == len || locD == -1 || locD == 0 || locD == len || email.indexOf("@",(locA+1)) != -1 || email.substring(locA - 1, locA) == locD || email.substring(locA + 1, locA + 2) == locD || email.indexOf(".",(locA + 2)) == -1 || email.indexOf(" ") > -1) 
	{
		return false;
	}
	else
	{
		return true;
	}
}