function ogp_img(vparam)
{
	var url = 'https://www.nekovideo.net/?v=' + vparam;
	var img_url = 'https://i.ytimg.com/vi/' + vparam + '/hqdefault.jpg';
	
	var headData = document.head.children;
	for (var i = 0; i < headData.length; i++) {
		// OGP: ogp:url and ogp:image
		var propertyVal = headData[i].getAttribute('property');
		if(propertyVal !== null) {
			if(propertyVal.indexOf('og:url') != -1) {
				headData[i].setAttribute('content', url);
			}
			if(propertyVal.indexOf('og:image') != -1) {
				headData[i].setAttribute('content', img_url);
			}
		}
		// OGP-Twitter: twitter:image
		var nameVal = headData[i].getAttribute('name');
		if(nameVal !== null) {
			if(nameVal.indexOf('twitter:image') != -1) {
				headData[i].setAttribute('content', img_url);
			}
		}
	}
}