// JavaScript Document
function checkform()
{
		if ((document.feedback.name.value=='') && (document.feedback.email.value=='') && (document.feedback.comments.value==''))
		{
				alert('You have not filled in the \'name\', \'email\' and \'comments\' fields.');
				return false;
		}
		else if ((document.feedback.name.value=='') && (document.feedback.email.value==''))
		{
				alert('You have not filled in the \'name\' and \'email\' fields.');
				return false;
		}
		else if ((document.feedback.name.value=='') && (document.feedback.comments.value==''))
		{
				alert('You have not filled in the \'name\' and \'comments\' fields.');
				return false;
		}
		else if ((document.feedback.email.value=='') && (document.feedback.comments.value==''))
		{
				alert('You have not filled in the \'email\' and \'comments\' fields.');
				return false;
		}
		else if (document.feedback.name.value=='')
		{
				alert('You have not filled in the \'name\' field.');
				return false;
		}
		else if (document.feedback.email.value=='')
		{
				alert('You have not filled in the \'email\' field.');
				return false;
		}
		else if (document.feedback.comments.value=='')
		{
				alert('You have not filled in the \'comments\' field.');
				return false;
		}
}