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sukienbanphim.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body onload="docReady()">
<img id="nobita" src="img/nobita.png" alt="anh bi loi" style="position:absolute;left:0; top:0;" height="400"
width="320"/>
<script>
// tai sao ham rightArrowPressed lai +5 px
function upArrowPressed() {
let element = document.getElementById("nobita");
element.style.top = parseInt(element.style.top) - 5 + "px";
}
function downArrowPressed() {
let element = document.getElementById("nobita");
element.style.top = parseInt(element.style.top) + 5 + "px";
}
function leftArrowPressed() {
let element = document.getElementById("nobita");
element.style.left = parseInt(element.style.left) - 5 + "px";
}
function rightArrowPressed() {
//debugger;
let element = document.getElementById("nobita");
element.style.left = parseInt(element.style.left) + 5 + "px";
}
function moveSelection(evt) {
//debugger;
console.log(evt);
switch (evt.keyCode) {
case 37:
leftArrowPressed();
break;
case 39:
rightArrowPressed();
break;
case 38:
upArrowPressed();
break;
case 40:
downArrowPressed();
break;
}
}
function moveSelection2(evt) {
//debugger;
console.log(evt);
switch (evt.key) {
case "ArrowLeft":
leftArrowPressed();
break;
case "ArrowRight":
rightArrowPressed();
break;
case "ArrowUp":
upArrowPressed();
break;
case "ArrowDown":
downArrowPressed();
break;
}
}
function docReady() {
//debugger;
window.addEventListener('keydown', moveSelection);
}
</script>
</body>
</html>