function qqcao(){
 var type = undefined;
 var param = "";
 var sid = 2;
 var rawuin = 'qq号码';
 var qsig = "undefined";
 var QQApi = {
  openURL: function(url){
   var i = document.createElement('iframe');
   i.style.display = 'none';
   i.onload = function() { i.parentNode.removeChild(i); };
   i.src = url;
   document.body.appendChild(i);
   
   var returnValue = QQApi.__RETURN_VALUE;
   QQApi.__RETURN_VALUE = undefined;
   return returnValue;
  },
  isAppInstalled: function(scheme) {
   var parameters = {'scheme':scheme};
   var r = QQApi.openURL('jsbridge://app/isInstalled_?p=' + encodeURIComponent(JSON.stringify(parameters)));
   return r ? r.result : null;
  },
  isQQWebView: function(){
   return QQApi.isAppInstalled('mqq') == true;
  },
  __RETURN_VALUE: undefined
 };
 var usa=navigator.userAgent;
 var p;
 var mobile_q_jump = {
  android:"https://play.google.com/store/apps/details?id=com.tencent.mobileqq",
  ios:"itms-apps://itunes.apple.com/cn/app/qq-2011/id444934666?mt=8",
  winphone:"http://www.windowsphone.com/zh-cn/store/app/qq/b45f0a5f-13d8-422b-9be5-c750af531762",
  pc:"http://mobile.qq.com/index.html"
 };
 var isMQ = 0;
 if(typeof type == "undefined") type = 1;
 if(usa.indexOf("Android")>-1){
  p = "android";
 }
 else if(usa.indexOf("iPhone")>-1 || usa.indexOf("iPad")>-1 || usa.indexOf("iPod")>-1){
  p = "ios";
 }
 else if(usa.indexOf("Windows Phone") > -1 || usa.indexOf("WPDesktop") > -1){
  p = "winphone";
 }
 else {
  p = "pc";
 }
 if(p == "ios"){
  //防止循环
  if(history.pushState)
   history.pushState({},"t","#");
  isMQ = QQApi.isQQWebView();
  if (!isMQ){
   var sc = document.createElement("script");
   sc.src = "http://__.qq.com/api/qqapi.js";
   sc.onload = function(){
    if(window['iOSQQApi']){
     isMQ =iOSQQApi.device.isMobileQQ();
    }
   };
   document.body.appendChild(sc);
  }
 }
 else if(p == "pc" && qsig != "undefined"){
  window.open(qsig,"_self");
 }
 if(type == 1){//手Q
  var isSuccess = true;
  var f = document.createElement("iframe");
  f.style.display = "none";
  document.body.appendChild(f);
  f.onload = function(){
   isSuccess = false;
  };
  if(p == "ios" && sid == 1){
   f.src = "mqqapi://card/show_pslcard?src_type=internal&version=1&uin="+ rawuin +"&card_type=person&source=qrcode";
  }
  if(p == "ios" && sid == 2){//ios并且为群名片
   f.src = "mqqapi://card/show_pslcard?src_type=internal&version=1&uin="+ rawuin +"&card_type=person&source=qrcode";
  }
  else if(p != "pc"){
   var url = window.location.href.split("&");
   f.src = "mqqopensdkapi://bizAgent/qm/qr?url=" + encodeURIComponent(url[0]);
  }
  if(p == "android" && sid == 1){
   f.src = "mqqapi://card/show_pslcard?src_type=internal&version=1&uin="+ rawuin +"&card_type=person&source=qrcode";
  }
  if(p == "android" && sid == 2){//ios并且为群名片
   f.src = "mqqapi://card/show_pslcard?src_type=internal&version=1&uin="+ rawuin +"&card_type=person&source=qrcode";
  }
  var now = Date.now();
  setTimeout( function(){
   if((p == "ios" && !isMQ && Date.now() - now < 2000) || (p == "android" && !isSuccess) || ((p == "winphone" && Date.now() - now < 2000))){
    var jumpUrl = mobile_q_jump[p];
    if(jumpUrl) window.open(jumpUrl,"_self");
   }
  } , 1500);
  
 }
}

//pc

tencent://Message/?Uin=QQ号码&websiteName=www.cn-mcn.com&Menu=yes

//带图片 pc
<a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=QQ号码&site=qq&menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=2:QQ号码:41" alt="点击这里给我发消息" title="点击这里给我发消息"/></a>