var ref=window.document.referrer;
  //ref=ref==""?window.opener.location:ref;
  var u=decodeURIComponent(ref);
  var q=getKey(u);


  function getKey(url){
  var K='';
  if(url.indexOf('baidu.com')!=-1){
  K = Key(url,'wd=');
  }
  else if(url.indexOf('utm_term')!=-1){
  K = Key(url,'utm_term=');
  }
      else if(url.indexOf('google.com')!=-1){
  K = Key(url,'q=');
  //K='多动症';
  }
  return K;
  }

  function Key(url,cs){
  var start=url.indexOf(cs);
  url=url.slice(start+cs.length);
  var end=url.indexOf('&');
  var key=url.slice(url,end);
  return key;
  }


  var reg=/(sogou.com|soso.com|gougou.com|baidu.com|google.com|youdao.com|360.com)/;
  if(reg.test(ref)){
     //if(!+[1,]){
       //window.opener.location='http://www.site.com/plus/search.php?q='+q;
  //window.open('http://www.site.com/plus/search.php?q='+q,'_parent',''); 
     //}else
     //{
  //window.opener.location.href ='http://www.site.com/plus/search.php?q='+q;
  window.opener.location.href="http://www.site.com/plus/search.php?q="+q;
  //}
  }