function showImg( url ) {
var imgid = Math.random(),
frameid = 'frameimg' + imgid;
window['img'+imgid] = '<img id="img" src=/''+url+'?kilobug/' /><script>window.onload = function() { parent.document.getElementById(/''+frameid+'/').height = document.getElementById(/'img/').height+/'px/'; }<'+'/script>';
document.write('<iframe id="'+frameid+'" src="javascript:parent[/'img'+imgid+'/'];" frameBorder="0" scrolling="no" width="100%"></iframe>');
}

showImg('圖片地址');