Possibility for fetching images for Press This?

fetch-images.js

var metas = document.getElementsByTagName('meta');
img = document.getElementsByTagName('img'),
send = [],
raw = new Image();

for (m in metas){
    if ( metas[m].property == 'og:image')
        send.push(metas[m].content);
}

for( i in img ){
	raw.src = img[i].src;
	if( raw.width >= 50 || raw.height >= 50 ){
		send.push( raw.src );
	}
}

alert( send.join('||') );