function validatenewsletterform() {

    var error = '';
    
    if (!validateEmail(document.getElementById('newsletterSignupInput').value,1,0)){
		error = alert('Please enter a valid email address');
		document.getElementById('newsletterSignupInput').className='errorInput';
	}
	else
	{
		document.getElementById('newsletterSignupInput').className='noerrorInput';
	}
	
	if (error == '')
	{
		return true;
	}
	else
	{
		return false;
	}
	
}

function validateform()
{
	var error = '';

	if (document.contactform.message.value == '' || document.contactform.message.value == 'Please type your message' || document.contactform.message.value == 'Message...'){
		error = 'Please type your message';
		document.getElementById('message').value=error;
		document.getElementById('message').className='errorInput';
	}
	else
	{
		document.getElementById('message').className='noerrorInput';
	} 							
	
	if (document.contactform.email)
	{
		if (!validateEmail(document.contactform.email.value,1,0)){
			error = 'Please enter a valid email address';
			document.getElementById('email').value=error;
			document.getElementById('email').className='errorInput';
		}
		else
		{
			document.getElementById('email').className='noerrorInput';
		}
	}

	if (document.contactform.contactnum.value == '' || document.contactform.contactnum.value == 'Please enter your contact number' || document.contactform.contactnum.value == 'Number...'){
		error = 'Please enter your contact number';
		document.getElementById('contactnum').value=error;
		document.getElementById('contactnum').className='errorInput';
	}
	else
	{
		document.getElementById('contactnum').className='noerrorInput';
	} 
	
	if (document.contactform.name.value == '' || document.contactform.name.value == 'Please enter your name' || document.contactform.name.value == 'Name...'){
		error = 'Please enter your name';
		document.getElementById('name').value=error;
		document.getElementById('name').className='errorInput';
	}
	else
	{
		document.getElementById('name').className='noerrorInput';
	} 

	if (error == '')
	{
		return true;
	}
	else
	{
		return false;
	}
}

function validateEmail(addr,man,db) 
{
	if (addr == '' && man) 
	{
	  if (db) alert('Please enter a valid email address');
	  return false;
	}
										
	var invalidChars = '\/\'\\ ";:?!()[]\{\}^|';
										
	for (i=0; i<invalidChars.length; i++) 
	{
	  if (addr.indexOf(invalidChars.charAt(i),0) > -1) 
	  {
		if (db) alert('email address contains invalid characters');
		  return false;
	  }
	}
										
	for (i=0; i<addr.length; i++) 
	{
	  if (addr.charCodeAt(i)>127) 
	  {
		if (db) alert("email address contains non ascii characters.");
		  return false;
	  }
	}

	var atPos = addr.indexOf('@',0);
										
	if (atPos == -1) 
	{
	  if (db) alert('email address must contain an @');
		return false;
	}
	if (atPos == 0) 
	{
	  if (db) alert('email address must not start with @');
		return false;
	}
	if (addr.indexOf('@', atPos + 1) > - 1) 
	{
	  if (db) alert('email address must contain only one @');
		return false;
	}

	if (addr.indexOf('.', atPos) == -1) 
	{
	  if (db) alert('email address must contain a period in the domain name');
		return false;
	}
	if (addr.indexOf('@.',0) != -1) 
	{
	  if (db) alert('period must not immediately follow @ in email address');
		return false;
	}
	if (addr.indexOf('.@',0) != -1)
	{
	  if (db) alert('period must not immediately precede @ in email address');
		return false;
	}
	if (addr.indexOf('..',0) != -1) 
	{
	  if (db) alert('two periods must not be adjacent in email address');
		return false;
	}

	var suffix = addr.substring(addr.lastIndexOf('.')+1);
	if (suffix.length != 2 && suffix != 'com' && suffix != 'net' && suffix != 'org' && suffix != 'edu' && suffix != 'int' && suffix != 'mil' && suffix != 'gov' & suffix != 'arpa' && suffix != 'biz' && suffix != 'aero' && suffix != 'name' && suffix != 'coop' && suffix != 'info' && suffix != 'pro' && suffix != 'museum') 
	{
	  if (db) alert('invalid primary domain in email address');
		return false;
	}
	return true;
}