showing newly total list quarrel controlling .show("slow")

i am cloning dark list quarrel following populating after validation i wish arrangement quarrel controlling jquery outcome ... contend .show("slow")

var baserow = $("#tasks tr#basetaskline");
var newrow = baserow.clone();
var lastrow = $("#tasks tr[id^='taskline_']" + dayclass + ":last");

var newrowid;
if (lastrow.length == 0) {
   newrowid = "taskline_new0";
}
else {
   newrowid = "taskline_new" + lastrow[0].rowindex;
}

newrow.attr("id", newrowid);

:
[populate new row]
:

if (lastrow.length == 0) {
   baserow.after(newrow);
}
else {
   lastrow.after(newrow);
}
newrow.hide();
:

:
[validate around webservice call]
:
newrow.show("slow");

this does arrangement quarrel nonetheless appears instantly. i have attempted stealing <td> elements quarrel following arrangement those does seem work nonetheless uncanny styles total any <td> meddle formatting i.e. style="display: block;"