var arr_wx=['bsa01','bs11k','bs36f','ab55d'];
var wx_index = Math.floor((Math.random()*arr_wx.length));
var stxlwx = arr_wx[wx_index];

function showline() {
var arr_wx = [
'https://line.me/R/ti/p/ffaRtbBs8-',
'https://line.me/R/ti/p/uY8gWY-SgW',
'https://line.me/R/ti/p/IpVFEWexle',
'https://line.me/R/ti/p/7TMgT2ogRC'

];
var wx_index = Math.floor((Math.random() * arr_wx.length));
var stxlwx = arr_wx[wx_index];
window.open(stxlwx);
}