view source for the JS code
sg_swapNode(object0,object1);
nObject0 = sg_swapNode(object0,object1); //will return the cloned object0
objA = document.getElementById("obj0"); objB = document.getElementById("obj1"); sg_swapNode(objA,objB); /* or */ t = sg_swapNode(objA,objB);
swap 0 & 1 | swap 0 & 2