Erro ESTRanho

Boa tarde pessoal, onde estou errando na contatenacao?

<script type="text/javascript">
$(document).ready(function(){

 $("#entrar").click(function(event)
 {
 event.preventDefault();
 var email = $("#txtEmail").val;
 $.ajax
 ({
 url:'verifica.aspx?email=' + "'" + email + "'",
 // url:'verifica.aspx?email=' + email,
 success : function(data)
 {
 $("#signes").html(data);
 }

 });
 });

});

</script>