how to event more keys within javascript -

i want eventing more keys in javascript code:

<script>  function open(e) {          if (e.type !== "blur") {          if (e.keycode === 70) {              alert("pressed f");          }      }  }  document.onkeydown = open;  </script>

what getting question want detect more keys presses. best way detect key presses switch statement

function open(e) {    if (e.type !== "blur") {      switch (e.keycode) {        case 70:          alert("pressed f");          break;                  case 65:          alert("pressed a");          break;                  default:          alert("i don't know key!");//this line removable          break;      }    }  }  document.onkeydown = open;

how works

the way switch works is:

switch (value) {     case this_value:       code       break;       default:       code       break; } 

that worst explanation you've seen can read here

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without keycode

keycodes kind of irritating figure out, can use:

function open(e) {   if (e.type !== "blur") {     switch (string.fromcharcode(e.keycode)) {       case "f":         alert("pressed f");         break;        case "a":         alert("pressed a");         break;        case "b":         alert("pressed b");        default:         alert("i don't know key!");//this line removable         break;     }   } } document.onkeydown = open; 

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detect key combinations

when detecting key combinations, can use && make sure both key's pressed. without more complicated. can use:

e.metakey window key on windows, command key on mac

e.ctrlkey control key

e.shiftkey shift key

e.altkey alt key

use them as:

if (e.ctrlkey && e.keycode === 65) {     alert("control , key pressed"); } 

to detect keys pressed (multiple) found this fiddle (not mine), , question here