function resizeImgs() {
	var imgs = document.getElementsByTagName('img');
	for(var i=0; i < imgs.length; i++){
		if( imgs[i].width > 600 ){
			var factor = imgs[i].height / imgs[i].width;
			imgs[i].width = 600;
			imgs[i].height = 600 * factor;
		}
	}
}