function checkContactForm()
{
	var name = document.getElementById('name').value;
	var email = document.getElementById('email').value;
	var subject = document.getElementById('subject').value;
	var emailformat = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	if (name.length == 0)
	{
		alert('Please enter your name!');
		return false;
	}
	if (!emailformat.test(email))
	{
		alert('Enter a valid email address!');
		return false;
	}
	if (subject.length == 0)
	{
		alert('Please enter subject!');
		return false;
	}

	return true;
}