Javascript JSON and ParseJson

echo '{"srt":"'.$rw->idx.'","nosur" : "'.$rw->nosur.'","kode": "'.$rw->kode.'", "cetak" : "'.$rw->cetak.'", "url" : "'.$rw->url.'"}'

$.get("?ajax=../cetak/print2&cetak=" + srt,function(response){
        if(response!=""){
            var json=$.parseJSON(response)
            $('#printmodal').modal()                   
            fmcetak=document.forms['fmcetak']
            fmcetak.action='.?ajax='+loader+'&srt='+srt+'&src='+src
            fmcetak['nosur'].value=json['nosur']
            fmcetak.submit()
        }
})