function showImage(id, range, no) {
	window.open("viewimage.php?id=" + id + "&range=" + range + "&no=" + no, "viewer", "width=620, height=665, status=no,toolbar=no,menubar=no,scrollbars=no, resizable=no");
}

function validate() {
	var form			= document.form;
	var author			= form.author.value.replace(/^\s*|\s*$/g, "");
	var comment	= form.comment.value.replace(/^\s*|\s*$/g, "");

	if (author == "") {
		alert("กรุณากรอกชื่อด้วยครับ");

		form.author.focus();
		return;
	} else if (comment == "") {
		alert("กรุณากรอกความคิดเห็นด้วยครับ");

		form.comment.focus();
		return;
	}
	
	form.submit();
}