js实现页面分享代码share，不需要第三方接口

废话不多说，上代码demo
<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
	</head>
	<body>
		
		<div class="share_top_style">
		        <a href="javascript:void()" class="" onClick="dofristshare('sina')"><img src="images/sina.png" alt="新浪微博"></a>
		
		        <a href="javascript:void()" class="" onClick="dofristshare('tx')"><img src="images/tx.png" alt="腾讯微博"></a>
		
		        <a href="javascript:void()" class="" onClick="dofristshare('rr')"><img src="images/rr.png" alt="人人网"></a>
		
		        <a href="javascript:void()" class="" onClick="dofristshare('qzone')"><img src="images/qq.png" alt="QQ空间"></a>
		
		        <a href="javascript:void()" class="" onClick="dofristshare('douban')"><img src="images/db.png" alt="豆瓣"></a>
		</div>
		
		
		<script type="text/javascript">
			function dofristshare(type) {
			    var title = encodeURIComponent("新年快乐,马年吉祥");
			    var link = encodeURIComponent('http://www.baidu.com');
			    var image = encodeURIComponent('http://www.baidu.com/img/bdlogo.gif');
			
			    if (type == "sina") {
			        window.open("http://v.t.sina.com.cn/share/share.php?url=" + link + "&title=" + title + "&content=utf8&pic=" + image);
			    }
			
			    if (type == "tx") {
			        window.open("http://v.t.qq.com/share/share.php?url=" + link + "&title=" + title + "&pic=" + image);
			    }
			
			    if (type == "qzone") {
			        window.open("http://sns.qzone.qq.com/cgi-bin/qzshare/cgi_qzshare_onekey?url=" + link + "&title=" + title  + "&pics=" + image);
			    }
			
			    if (type == "rr") {
			        window.open("http://widget.renren.com/dialog/share?resourceUrl=" + link + "&title=" + title  + "&pic=" + image);
			    }
			
			   if (type == "douban") {
			        window.open("http://www.douban.com/recommend/?url=" + link + "&title=" + title + "&image=" + image);
			    }
			
			    return false;
			
			}
		</script>
	</body>
</html>