get reference to object

get reference to object

Hi I trying to figure out how can i get reference to object.
eg:

var iframe = $("#myiframe").get(0);
iframe.ready(function(e){
                alert('ready ');
}); 

It doesn't work but why because example below works
$("#myiframe").ready(function(e){
                alert('ready '); // works perfect
}); 

Thanx for suggection