不允许临时会话

<a target=blank href=http://wpa.qq.com/msgrd?V=1&Uin=1300105556&Exe=QQ&Site=www.54xiake.cn&Menu=yes>
<img border="0" SRC=http://wpa.qq.com/pa?p=1:1300105556:1 alt="给我发消息"></a>

<a target=blank href=tencent://message/?uin=1300105556&Site=www.54xiake.cn&Menu=yes><img border="0" SRC=http://wpa.qq.com/pa?p=1:1300105556:1 alt="点击这里给我发消息"></a>

允许临时会话

<a href="http://sighttp.qq.com/cgi-bin/check?sigkey=29eb51d0f3a0ed2cfc30792f2e05b0660365c32763a644148fa1e0b0b1eca19b"; target=_blank; onclick="var tempSrc=‘http://sighttp.qq.com/wpa.js?rantime=‘+Math.random()+‘&sigkey=29eb51d0f3a0ed2cfc30792f2e05b0660365c32763a644148fa1e0b0b1eca19b‘;var oldscript=document.getElementById(‘testJs‘);var newscript=document.createElement(‘script‘);newscript.setAttribute(‘type‘,‘text/javascript‘); newscript.setAttribute(‘id‘, ‘testJs‘);newscript.setAttribute(‘src‘,tempSrc);if(oldscript == null){document.body.appendChild(newscript);}else{oldscript.parentNode.replaceChild(newscript, oldscript);}return false;"><img border="0" SRC=‘http://wpa.qq.com/pa?p=1:1300105556:41‘ alt=""></a>

代码生成网址：http://wp.qq.com/