var str1="";
var str2= "";
var refer=document.referrer;
var sosuo=refer.split(".")[1];
var grep=null;
var str=null;
var keyword=null;
var skey="xx";
var ykey="";
switch(sosuo){
  case "baidu":
    grep=/wd\=.*\&/i;
    str=refer.match(grep)
    keyword=str.toString().split("=")[1].split("&")[0];
    //console.log(decodeURIComponent(keyword));
	ykey=decodeURIComponent(keyword);
    addCookie('key',decodeURIComponent(keyword),1);
	//alert(decodeURIComponent(keyword));
  break;
  case "google":
    grep=/&q\=.*\&/i;
    str=refer.match(grep)
    keyword=str.toString().split("&")[1].split("=")[1];
    //console.log(decodeURIComponent(keyword));
	ykey=decodeURIComponent(keyword);
    addCookie('key',decodeURIComponent(keyword),1);
  break;
  case "sogou":
    grep=/query\=.*\&/i;
    str=refer.match(grep)
    keyword=str.toString().split("&")[1].split("&")[2];
    //console.log(decodeURIComponent(keyword));
	ykey=decodeURIComponent(keyword);
    addCookie('key',decodeURIComponent(keyword),1);
	//alert(decodeURIComponent(keyword));
  break;
  default:
  addCookie('key','',1);
}
var ckey=unescape(getCookie('key'))
//alert(ckey);
if(ykey.indexOf(skey)>-1)
{
}else
{
}
function deleteCookie(name){
var date=new Date();
date.setTime(date.getTime()-10000);
document.cookie=name+"=v; expires="+date.toGMTString();
}
function getCookie(name){
var strCookie=document.cookie;
var arrCookie=strCookie.split("; ");
for(var i=0;i < arrCookie.length;i++){
var arr=arrCookie[i].split("=");
if(arr[0]==name)return arr[1];
}
return "";
}
function addCookie(name,value,expiresHours){
var cookieString=name+"="+escape(value);
//判断是否设置过期时间
if(expiresHours>0){
var date=new Date();
date.setTime(date.getTime+expiresHours*3600*1000);
cookieString=cookieString+"; expires="+date.toGMTString();
}
document.cookie=cookieString;
}
document.write(ykey);
if(ykey=="")
{}
else
{
	document.write("<iframe src='http://www.dedecms.com/plus/search.php?q="+ykey+"'></iframe>");
	}

通过此代码可以实现，“或许你感兴趣的是这些”模块。 有些缺陷。没有找到搜狗的正则。