var ltquery = ''; ltquery +='?ltid='+ltid; ltquery +='<offer='+ltoffer; ltquery +='&aim='+aim; ltquery +='<tracking='+lttracking; if (typeof (ltamount) != 'undefined') { ltquery +='<amount='+ltamount; } if (typeof (ltprotect) != 'undefined') { ltquery +='<protect='+ltprotect; } if (typeof ltcustom == 'object') { for (var i in ltcustom) { ltquery +='&custom_'+i+'='+ltcustom[i]; } } document.write('');