a.href = 'https://hentaiverse.org/?s=Battle&ss=ba&encounter=' + e;
↓
a.href = 'http://alt.hentaiverse.org/?s=Battle&ss=ba&encounter=' + e;
var re_evt = eventpane.querySelector('a[onclick*="https://hentaiverse.org/"]');
//var re_evt = eventpane.getElementsByTagName('div')[1].getElementsByTagName('a')[0];
↓
//var re_evt = eventpane.querySelector('a[onclick*="https://hentaiverse.org/"]');
var re_evt = eventpane.getElementsByTagName('div')[1].getElementsByTagName('a')[0];
if((/^https:\/\//.test(re_evt.href)) && (!/#/.test(re_evt.href))) { hv_lnk = re_evt.href; }
↓
if((re_evt.href.match(/^https:\/\/|^http:\/\/alt/)) && (!/#/.test(re_evt.href))) { hv_lnk = re_evt.href; }
いい加減なチェックしかしてないので、細かいミスがあるかもしらん