Trouble binding jquery javascript click event to asp.net button

Im using the following code:

jQuery(document).ready(function () {

jQuery('<%= btnSave.ClientID %>').click(function(){

    alert('hello world');

});

});

And when I click the asp.net button:

<asp:Button ID="btnSave" runat="server" Text="Save" OnClick="btnSave_Click" />

It just doesnt fire. Anybody know why?

Cheers, Pete

jQuery(document).ready(function () {

jQuery('#<%= btnSave.ClientID %>').click(function(){

    alert('hello world');
});

});

And why you put .ClientID?? in the asp you dont put any class to the button

Sorry for my english

Hi Sorry I figured it out it needs a pound sign before the selector!

 jQuery(document).ready(function () {

jQuery('#<%= btnSave.ClientID %>').click(function(){

    alert('hello world');

});

});

Another alternative here is to use a class so you can move your code externally, for example:

<asp:Button ID="btnSave" CssClass="btnSave" runat="server" Text="Save" OnClick="btnSave_Click" />

Then your code can look like this:

jQuery(function($) {
  $('.btnSave').click(function() {
    alert('hello world');
  });
});

Which can be in an external .js, so your users download it once, not as part of the page each time. Alternatively, a bit less efficient is to use the attribute ends-with selector, like this:

jQuery(function($) {
  $('input[id$=btnSave]').click(function() {
    alert('hello world');
  });
});

This will select all <input> elements that have an ID ending in btnSave.