Error, "Object Required"

function __isValidEmailAddr(email)
{
	var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	
	if (filter.test(email))
		return true;
	else
		return false;
}

function __checkContactForm()
{
	var _name = document.getElementById('name').value;
	var _email = document.getElementById('email').value;
	var _comments = document.getElementBy('comments').value;
	var _errorTrigger = false;
	var _errorMessage = '';
	
	if ( _name = '' )
		{
			_errorTrigger = true;
			_errorMessage += '\n~ You must provide a name';
		}
	else if ( _name.length < 3 )
		{
			_errorTrigger = true;
			_errorMessage += '\n~ You must provide a legitimate name';
		}
	
	if ( __isValidEmailAddr(_email) == false )
		{
			_errorTrigger = true;
			_errorMessage += '\n~ You must provide a real email address';
		}
		
	if ( _comments = '' )
		{
			_errorTrigger = true;
			_errorMessage += '\n~ You must provide a message';
		}
	else if ( _comments.length < 10 )
		{
			_errorTrigger = true;
			_errorMessage += '\n~ You must provide a legitimate message';
		}
		
	if ( errorTrigger == true )
	{
		alert('\nThe following error(s) were discovered prior to form submission.\n' + _errorMessage + '\n\n');
		return false;
	}
	
	delete _name;
	delete _email;
	delete _comments;
	delete _errorTrigger;
	delete _errorMessage;
	
	return true;
	
}

if ( _name = '' )

if ( _name == '' )