var str='北京,上海,广州,深圳,河南,肇庆';
var limits=str.split(',');
console.log(limits);
var g_show_ad=true;
for(var i=0;i<limits.length;i++)
{
    var c=limits[i]||'';
    if( c.length && returnCitySN.cname.indexOf(c)>-1 )
    {
        g_show_ad=false;
        break;
    }
}

function showAds(catid,id)
{
    var scripts=document.getElementsByTagName('script');
    var this_script=scripts[scripts.length-1];
    var ad_parent=this_script.parentNode;

    if(g_show_ad)
    {
        var url='/index.php?m=ads&a=show_ads&catid=' + catid;
        if(typeof id!="undefined") url+='&id='+id;
        $.get(url, function (html)
        {
            ad_parent.innerHTML = html;
        });
    }
}