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Нажатие на картинку Canvas

Ser8191

Asked by Ser8191,

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Ser8191 Explorer

Ser8191

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Уважаемые мастера, подскажите: 

<!DOCTYPE html>
<html>
<head>
<title>Canvas from scratch</title>
<meta charset="utf-8">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
$(document).ready(function() {
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");

var lverx = document.getElementById("lverx");
lverx.onload = function() {   
ctx.drawImage(lverx, 0, 0, 200, 83);
}

var pverx = document.getElementById("pverx");
pverx.onload = function() {   
ctx.drawImage(pverx, 200, 0, 200, 83);
}

var lniz = document.getElementById("lniz");
lniz.onload = function() {   
ctx.drawImage(lniz, 0, 83, 200, 83);
}

var pniz = document.getElementById("pniz");
pniz.onload = function() {   
ctx.drawImage(pniz, 200, 83, 200, 83);
}

});
</script>
</head>

<body>
<canvas id="myCanvas" width="400" height="200"></canvas>
<img id="lverx" src="01.png" style="display:none;" />
<img id="pverx" src="02.png" style="display:none;" />
<img id="lniz" src="03.png" style="display:none;" />
<img id="pniz" src="04.png" style="display:none;" />
</body>
</html>

Как при нажатии на, к примеру, эту

var lverx = document.getElementById("lverx");
lverx.onload = function() {   
ctx.drawImage(lverx, 0, 0, 200, 83);

картинку выполнить нужную функцию и заменить эту картинку на другую.

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