[jQuery] Merge 2 divs [jQuery]

[Colonel]

Hi all, I have 2 divs. How I can merge this 2 divs (first div I have
after $.load like this $("#div1").load("file.php")) by jQuery?
I was trying .append, .appedndTo, but it's not working. May be Am not
properly trying.

$("#div2").append($("#div1"));
$("#div2").append($("#div1").html);
$("#div2").append("#div1");

$("#div1").appendTo($("#div2"));
$("#div1").appendTo($("#div2").html);
$("#div1").appendTo("#div2");

Sorry, I just study learn jQuery.

Thanks.