function validateDownload( name, email )
{	
	var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;

	if( name.value.length > 0 && filter.test(email.value) )
		return true;
	else
	{	if( name.value.length == 0 && !filter.test(email.value) )
			alert( "Please enter your name and email address to proceed." );
		else if( name.value.length == 0 )
			alert( "Please enter your name to proceed." );
		else
			alert( "Please enter a valid email address to proceed." );
		return false;
	}
}