function checkEngines(b,bl)
     {
        var ipts = document.getElementsByTagName("input");
        var id = bl?'link':'site';
        for(var i=0;i<ipts.length;i++)
        {
            if(ipts[i].type == "checkbox"&&ipts[i].name.toLowerCase().indexOf(id)!=-1)
            {
                ipts[i].checked = b;
            }
        }
     }