[jQuery] Finding id and setting as variable

[Liam Potter]

Hi guys, this should be a quick one
I have a div, which has a unqiue id (pulled from the database) so 
something like this.

<div class="msg" id="msg<%#Eval("PrimaryKeyID")%>">
</div>

and I'm trying to get the id number from it like this

var uid = $(".msg").id.replace('msg', "");

as I'm running a similar function

$("span.yes").click(function (event) {
           event.preventDefault();
           var inc = this.id.replace('yes', "");
});


I thought I could just replace the this for a selector but this doesn't 
work.

Can anyone let me know how I would do this.

Thanks,
Liam