javascript - what is the alternative to offsetLeft in internet-explorer (not work with me in ie) -

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my question obvious, doesn't need clarify.

my code

document.onkeypress = function(evt) {                 var elem = document.getelementbyid('box');                 evt = evt || window.event;                 var charcode = evt.charcode || evt.keycode;                 switch (charcode) {                     case 37:                         elem.style.position = 'absolute';                         elem.style.left = parseint(elem.offsetleft - 10) + 'px';                         elem.innerhtml = elem.offsetleft;                         break;                     case 38:                         elem.style.position = 'absolute';                         elem.style.top = parseint(elem.offsettop - 10) + 'px';                         elem.innerhtml = elem.offsettop;                         break;                     case 39:                         elem.style.position = 'absolute';                         elem.style.left = parseint(elem.offsetleft + 10) + 'px';                         elem.innerhtml = elem.offsetleft;                         break;                      case 40:                         elem.style.position = 'absolute';                         elem.style.top = parseint(elem.offsettop + 10) + 'px';                         elem.innerhtml = elem.offsettop;                         break;                     case 101:                         elem.style.position = 'relative';                         elem.style.left = 0 + 'px';                         elem.style.top = 0 + 'px';                         break;                      default:                  }             };

the previous example work fine in ff not work in ie.

what reason of offsetleft , offsettop don't work in ie.
there alternative internet-explorer or so, what's problem ?

try demo in jsfiddle.

i believe simple fix changing event listening keypress keydown

document.onkeydown = function(evt) {

jsfiddle


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