js获取各搜索引擎的关键词

//方法function GetQueryString() { ???????var refer = document.referrer; ???refer = refer + ‘&‘; ???var matches = ‘‘; ??????if(refer.match(/(www|m|youxuan)\.baidu/)){ ???????matches = refer.match(/\W(wd|word)\=(.*?)\&/i); ???????if(matches){ ???????????matches = matches[2]; ???????} ???}; ???if(refer.match(/m\.sm\.cn/)) { ?????????????matches = refer.match(/q\=(.*?)\&/i); ???????if(matches) { ???????????matches = matches[1]; ???????} ???}; ???if(refer.match(/sogou\.com/)) { ???????matches = refer.match(/keyword\=(.*?)\&/i); ???????if(matches) { ???????????matches = matches[1]; ???????} ???}; ??if(refer.match(/so\.com/)) { ???????matches = refer.match(/q\=(.*?)\&/i); ???????if(matches) { ???????????matches = matches[1]; ???????} ???}; ???if(matches && matches.indexOf("%") == 0) { ???????matches = decodeURIComponent(matches); ???} else { ???????matches = ‘‘; ???}; ???return matches;};// 调用方法var $wd=GetQueryString();if($wd&&$wd.length>0){}else{ ???$wd=GetQueryString("word")}if($wd&&$wd.length>0){ ???$wd=decodeURIComponent($wd); ???$line=‘关于【“‘+$wd+‘”】的问题,很荣幸为您解答疑问！‘;}else{ ???$line=‘ 您好，这里是......，请问有什么可以帮到您？‘;}$(‘#textFirst‘).html($line+"<span class=\"red\">（咨询）</span>");