// JavaScript Document

function cek_entri()
{
	status="";
	document.frm_guestbook.txt_nama.style.background = "";
	document.frm_guestbook.txt_email.style.background = "";
	document.frm_guestbook.txt_captcha.style.background = "";
	
	if(document.frm_guestbook.txt_nama.value==""){
		document.frm_guestbook.txt_nama.style.background = "#FC98A7";
		status = "error";	
	}
	if(document.frm_guestbook.txt_email.value!=""){
		reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
		address = document.frm_guestbook.txt_email.value;
		if(reg.test(address) == false) {
			document.frm_guestbook.txt_email.style.background = "#FC98A7";
			status = "error email";
   		}
	}
	if(document.frm_guestbook.txt_captcha.value==""){
		document.frm_guestbook.txt_captcha.style.background = "#FC98A7";
		status = "error";
	}
	if(status=="error"){
		alert('Proses Gagal...!');
	}else if(status=="error email"){
		alert('Alamat email anda tidak valid');
	}else{
		document.frm_guestbook.submit();
	}
}