In any way I do not can in what problemma jquery gives out an error in time: $('#advert').html(data);

What can problemma be in? How to correct it?

Error: div is null

http://***/files/js/jquery-1.2.6.pack.js

Line 997

function check_mcontent() {

mcontent = $('#mcontent').attr('id');

if (!mcontent) {

$('#pcontent').html('<table width="1000" cellspacing="0" cellpadding="0" border="0"><tr><td width="600" valign="top" align="left"><div id="mcontent" style="width: 670px"></div></td><td><div id="advert"><img src="/files/images/loading.gif" /></div></td></tr></table>');

$.post('/libs/ajax/block_inn.php?rand='+Math.random(), {},

function(data){

$('#advert').html(data);

});

}

}