// JavaScript Document

function HideShowLayer(obj) {
	if(document.getElementById(obj).style.display=="none")
		document.getElementById(obj).style.display="";
	else
		document.getElementById(obj).style.display ="none";
}

function CheckFaq () { 
	var f = document.frmFaq;
	if(f.cauhoi.value=="") {
		alert("Nhap cau hoi cua ban");
		f.cauhoi.focus();
		return false;
	}
	if(f.email.value=="") {
		alert("Nhap dia chi Email");
		f.email.focus();
		return false;
	}
	if(!CheckEmail(f.email)) {
		alert("Email khong chinh xat");
		f.email.focus();
		f.email.select();
		return false;
	}
	return true;
}

function CheckEmail(obj){
    var re = /^([A-Za-z0-9\_\-]+\.)*[A-Za-z0-9\_\-]+@[A-Za-z0-9\_\-]+(\.[A-Za-z0-9\_\-]+)+$/;
    var sEMail = obj.value;
    if (sEMail.search(re) == -1){
			return (false);
		}
	else{
		return (true);
    }
}
function CheckForm () { 
	var f = document.frmContact;
	if(f.ten.value=="") {
		alert("Nhap ten cua ban");
		f.ten.focus();
		return false;
	}
	if(f.email.value=="") {
		alert("Nhap dia chi Email");
		f.email.focus();
		return false;
	}
	if(!CheckEmail(f.email)) {
		alert("Email khong chinh xat");
		f.email.focus();
		f.email.select();
		return false;
	}
	if(f.tieude.value=="") {
		alert("Nhap tieu de");
		f.tieude.focus();
		return false;
	}
	
	if(f.noidung.value=="") {
		alert("Nhap noi dung lien he");
		f.noidung.focus();
		return false;
	}
	
	return true;
	
}

function CheckSearch () { 
	var f = document.fsearch;
	if(f.text_search.value=="") {
		alert("Vui long nhap tu khoa tim kiem");
		f.text_search.focus();
		return false;
	}
	return true;
}

function CheckLogin () { 
	var f = document.frmLogin;
	if(f.tendangnhap.value=="") {
		alert("Vui long nhap ten dang nhap");
		f.tendangnhap.focus();
		return false;
	}
	if(f.matkhau.value=="") {
		alert("Vui long nhap mat khau");
		f.matkhau.focus();
		return false;
	}
	return true;
}