looked easy enough... selector for .attr("iid) not getting value

looked easy enough... selector for .attr("iid) not getting value

//why can't i make this happen  I want to capture the numbers  1112,33803,0

 

<TR class=ms-itmhover id="wtf" iid="1112,33803,0" setEdgeBorder="true">wtw</TR>

 

 

$(document).ready(function () {

    var fulu = $("TR").attr("iid");

    alert(fulu);

});


jsfiddle:  http://jsfiddle.net/vhabhsrosed/3c5s3/


thanks for any insights.  -Dave