部分网站允许空白referer的防盗链图片的js破解代码

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('图片地址');