function bookmark(){
	if(navigator.userAgent.indexOf("MSIE") > -1){
		document.write('<!-'+'-[if IE]>');
		document.write('<input type="image" src="user_data/packages/v3_1/images/common/head-bookmark.jpg" width="200" height="43" alt="お気に入りに追加"');
		document.write(' onclick="window.external.AddFavorite(\'http://www.8san.com\',\'やっさんどっとこむ\')">');
		document.write('<![endif]-'+'->');
	}else if(navigator.userAgent.indexOf("Firefox") > -1){
		document.write('<input type="image" src="user_data/packages/v3_1/images/common/head-bookmark.jpg" width="200" height="43" alt="ブックマークに追加"');
		document.write(' onclick="window.sidebar.addPanel(\'やっさんどっとこむ\',\'http://www.8san.com\',\'\');">');
	}else if(navigator.userAgent.indexOf("Opera") > -1){
		document.write('<a href="http://www.8san.com" rel="sidebar" title="やっさんどっとこむ"><img src="user_data/packages/v3_1/images/common/head-bookmark.jpg" width="200" height="43" alt="お気に入りに追加" /></a></a>');
	}else{
		void(0);
	}
}