The question you linked isn't exactly what you were looking for, but the same concept can be used. Here's the jQuery equivalent only listening for Ctrl+s
$(document).on("keydown",function(e){
if (e.originalEvent.ctrlKey && e.which == 83/*"s"*/) {
setTimeout(function(){ //Fix for firefox. Ref: http://stackoverflow.com/questions/14860759/cant-override-ctrls-in-firefox-using-jquery-hotkeys
// do save stuff...
alert("Saved!"); // if you remove alert, you can remove setTimeout
},0);
return false;
}
});
http://jsfiddle.net/SEQVD/3/
Tested in Chrome, Firefox, and IE.