Hacker News Voting JavaScript

1 min read Original article ↗
function byId(id) {
return document.getElementById(id);
}
function vote(node) {
var v = node.id.split(/_/); // {'up', '123'}
var item = v[1];
// hide arrows
byId('up_' + item).style.visibility = 'hidden';
byId('down_' + item).style.visibility = 'hidden';
// ping server
var ping = new Image();
ping.src = node.href;
return false; // cancel browser nav
}