$('#btnSubmit').click(function(){	
		signup();
});	

function checkMail(){
		if(trimSpace($("#txtemail").val()) ==""){
			alert('Vui long nhap vao dia chi mail!');
			$("#txtemail").focus();
			return false;
		}else{
			email = trimSpace($("#txtemail").val());		
			if(email.length>0 && !isEmail(email)){			
				alert('Dia chi email khong hop le!');
				$("#txtemail").focus();
				return false;
			}
			else{			
				return true;
			}
		}
	}
function signup()
	{		
	if(checkMail()){	
		$.ajax({
		  type: "POST",
		  url: $('#txturl').val(),
		  data: { 'txtMail': 	$('#txtemail').val()},
		 success: function(data){		 	 
		 	$('#show').html('');
		 	$('#result').html(data);
		  },
		  error: function(){
			alert("Server is busy");
			 }	
		});	 
		}
	}