13 lines
351 B
JavaScript
13 lines
351 B
JavaScript
var i=0;
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var isZero=true;
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// signs include positive '+': 1, negative '-': -1, kali '$': $1, kako '!': !1
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var sign='+';
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document.addEventListener('keyup', function keyDownCallback(event){
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if(event.keyCode == 38){
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i++; document.getElementById('counter').innerHTML=i;
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}
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if(event.keyCode == 40){
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i--; document.getElementById('counter').innerHTML=i;
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}
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}); |