textbox key press by jQuery

Jquery
$(document).ready(function(){
var keypress_count1 = 0;
$("#txt_onkeypress").keypress(function(){
    keypress_count1++;   
  document.getElementById("<%=Label1.ClientID %>").innerHTML=document.getElementById("name_onkeypress").value;
});
});

HTML
<input type="text" id="txt_onkeypress" />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>