HTML파일 없이 이미지 사이즈에 맞게 팝업창 띄우기

<script Language="Javascript">
var cnj_img_view = null;
function cnj_win_view(img){
img_conf1= new Image();
img_conf1.src="./(img);
cnj_view_conf(img);
}

function cnj_view_conf(img){
if((img_conf1.width!=0)&&(img_conf1.height!=0)){
cnj_view_img(img);
} else {
funzione="cnj_view_conf('"+img+"')";
intervallo=setTimeout(funzione,20);
}
}

function cnj_view_img(img){
if(cnj_img_view != null) {
if(!cnj_img_view.closed) { cnj_img_view.close(); }
}
cnj_width=img_conf1.width+20;
cnj_height=img_conf1.height+20;
str_img="width="+cnj_width+",height="+cnj_height;
cnj_img_view=window.open(img,"cnj_img_open",str_img);
cnj_img_view.focus();
return;
}
</script>

<a href="./javascript:cnj_win_view("../img/cnjlogo.gif')"><img src="../img/cnjlogo.gif" border="0" width="247" height="55"></a>