基本上，我希望我的用户只需点击一个按钮，就可以获得一个小的弹出窗口，让他们通过一个主要的通信工具与我联系。
有人知道这类服务吗？
你需要涵盖很多不同的服务，并希望他们访问你的网站时正在运行该应用程序。
使用实时聊天或类似的方式-你可能已经看到了周围的事情类型：
http://www.livezilla.net/home/en/-免费
http://www.chat4support.com/-免费版本
http://www.craftysyntax.com/-免费（加上主页上毫无意义的关注）。
我还没有测试过它们，所以不能提供任何关于它们有多好的信息。。。希望这能有所帮助。
使用以下href格式创建链接：
<a href="im:<username>@<host>">SendMessage</a>
注意：要求客户端安装IM客户端，但并非所有IM客户端都支持。
对于AOL：
<a href="aim:goim?screenname=yourusername">Send Message</a>
对于雅虎：
<a href="ymsgr:sendIM?yourusername">Send Message</a>
对于谷歌：
<a href="gtalk:chat?jid=yourusername@gmail.com">Send Message</a>
对于MSN/Windows Live：
<a href="msnim:chat?contact=yourusername@youremail.com">Send Message</a>
对于ICQ：
<a href="icq:send_message?uin=12345">Send Message</a>
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