function check()
	{
	if(document.contact.name.value=="")
		{
		alert("Please enter your name.");
		document.contact.name.focus();
		return false;
	    }
	email = document.contact.email.value;
	if((pos=email.indexOf("@"))==-1)
		{
		alert("Please enter an e-mail address.");
		document.contact.email.focus();
		return false;
		}
	else
		{
		newemail=email.substring(pos);
		if(newemail.indexOf(".")==-1)
			{
			alert("Please enter an e-mail address.");
			document.contact.email.focus();
			return false;
			}
	    }
        if(document.contact.comment.value=="")
		{
		alert("Please enter your comment.");
		document.contact.comment.focus();
		return false;
	    }
	}