function isEmailAddress (string) {
  var addressPattern = /^(\w+[-])*(\w+[.])*(\w+[-])*\w+\@(\w+[-])*(\w+[.])+\w+$/;
  return addressPattern.test(string);
}

function Validate() {
	/*
		if ( document.logForm.TOPIC.selectedIndex >= 14 && document.logForm.TOPIC.selectedIndex <= 18 && (document.logForm.PRODUCT.selectedIndex < 2 || document.logForm.PRODUCT.selectedIndex > 6) && document.logForm.PRODUCT.selectedIndex != 9  ) {
			alert("If you have a question about a specific journal, please be sure to select it from the Product list.");
			return false;
		}
	*/	
	a = document.logForm.email
	if (a.value.length > 0) {
		if (!isEmailAddress(a.value))
		{
			alert("Please enter a valid e-mail address!");
			a.focus();
			return false;
		}
	}
				
	a = document.logForm.TOPIC;
	if (a.value == '') {
		alert("Please select a TOPIC")
		a.focus();
		return false;
	}

	a = document.logForm.COMMENT;
	if (a.value == '') {
		alert("Please write down your comment")
		a.focus();
		return false;
	}

	return true;
}