js 正则验证多个邮箱，用；隔开的那种

var r = /^((([a-z0-9_.-]+)@([da-z.-]+).([a-z.]{2,6};))*(([a-z0-9_.-]+)@([da-z.-]+).([a-z.]{2,6})))$/

var str = 'xxxx@126.com;123234234@qq.com;xxxxx@xxxxx.con.cn';
if (r.test(str))