做个试验，请勿回复
<a href="http://sighttp.qq.com/cgi-bin/check?sigkey=e9c10b648a3615aee8619fbbdf4451eee163e3cc2784a93d3f9d45da21eea2bc"; target=_blank; onclick="var tempSrc='http://sighttp.qq.com/wpa.js?rantime='+Math.random()+'&sigkey=e9c10b648a3615aee8619fbbdf4451eee163e3cc2784a93d3f9d45da21eea2bc';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=1:824076279:11' alt="点击这里给我发消息"></a>
