<a target="_blank" href=" http://wpa.qq.com/msgrd?v=3&uin=386273797&site=qq&menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=2:386273797:50" alt="点击这里给我发消息" title="点击这里给我发消息"></a>
调试欢乐多
document.write(str);
//如果在特定的标签中输出
//如<div id="QQ"></div>
var divQQ = document.getElementById("QQ");
divQQ.innerHTML="<a target='_blank' href=' http://wpa.qq.com/msgrd?v=3&uin=386273797&site=qq&menu=yes'><img border='0' src='http://wpa.qq.com/pa?p=2:386273797:50' alt='点击这里给我发消息' title='点击这里给我发消息'></a>";