function (obj) {
	var res = {}, i;
	for (i in obj) {
		res[i] = obj[i];
	}
	return res;
}
function (obj) {
	var res = {}, i;
	for (i in obj) {
		res[i] = obj[i];
	}
	return res;
}
function ( obj ) { var res = { } , i ; for ( i in obj ) { res [ i ] = obj [ i ] ; } return res ; }
get a simple copy of an object
get a simple copy of an object