How to Copy the value Text box to label

<asp:TextBox ID="Quantity" runat="server" Text='<%#Eval("Quantity") %>' class="PriceCopy"
                                        onblur="sumamt()" />

<asp:Label ID="lblQuantity" Text='<%#bind("Quantity") %>' runat="server" class="CopyQunt">

$(".PriceCopy").live("keyup", function (e) {
           debugger;
           var qun = $(this).val();
           var qunt = $("#lblQuantity").val(qun);
           alert(qunt);

       });