function checkEditorial() {	
	s = trimSpace($("#txtSender").val());	
	if(s.length>100 || s==""){
		alert('Muc "Nguoi gui" chua duoc nhap hoac lon hon 100 ky tu!');
		$("#txtSender").focus();
		return false;
	}
	s = trimSpace($("#txtSubject").val());	
	if(s.length>200 || s==""){
		alert('Muc "Tieu de" chua duoc nhap hoac lon hon 200 ky tu!');
		$("#txtSubject").focus();
		return false;
	}
	//-----------------------------------------
	s = trimSpace($("#txtAddress").val());	
	if(s!="" && s.length>100){
		alert('Muc "Dia chi" lon hon 100 ky tu!');
		$("#txtAddress").focus();
		return false;
	}
	s = trimSpace($("#txtPhone").val());	
	if(s!="" && s.length>50){
		alert('Muc "Dien thoai" lon hon 50 ky tu!');
		$("#txtPhone").focus();
		return false;
	}
	//------------------------------------------------------
	s = trimSpace($("#txtContent").val());	
	if(s=="" || s.length>1000){
			alert('Muc "Noi dung" chua duoc nhap hoac vuot qua so luong ky tu cho phep!');
			$("#txtContent").focus();
			return false;
	}
	s = trimSpace($("#txtCode").val());	
	if(s==""){
		alert('Ma bao ve ban chua nhap!');
		$("#txtCode").focus();
		return false;
	}
	if(s!=""){		
		if (!checkCaptcha())
		return false;
	}
	email = $("#txtFromMail").val();		
	if(email.length>0 && !isEmail(email)){			
		alert('Dia chi e-mail khong hop le!');
		return false;
	}		
	return true;
}

function checkCaptcha()
{
	var returnVal = false;
	$.ajax({
		  type: "POST",
		  url:  $('#txturl').val(),
		  	data: {'code': $('#txtCode').val()},
		  	async: false, 
		 	success: function(data) {	
				if (data=="no")
				{
					$('#trerror').attr('style', 'display:');
					$("#msgError").html("<font color=#bd0000>M&#227; b&#7843;o v&#7879; nh&#7853;p ch&#432;a &#273;&#250;ng</font>");
					returnVal = false;
				}
				else
				{
					$('#trerror').attr('style', 'display:none');
					$("#msgError").html("");
					returnVal = true;
				}		
		  	},
		  	error: function() {
				alert ('bi chi ri bay')
			}
		
		});
		return returnVal;	
}