Slide 43

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Mouse Event Example

<!DOCTYPE html>
<html>
<head>
<title>Mouse Movements</title>
<link rel="stylesheet" href="script04.css">
<script src="script04.js"></script>
</head>
<body>
<img src="images/circle.gif" alt="left eye" id="lEye">
<img src="images/circle.gif" alt="right eye" id="rEye">
<img src="images/lilRed.gif" alt="left eyeball" id="lDot">
<img src="images/lilRed.gif" alt="right eyeball" id="rDot">
</body>
</html>

body {
background-color: #FFF;
}
#lEye, #rEye {
position: absolute;
top: 100px;
width: 24px;
height: 25px;
}
#lDot, #rDot {
position: absolute;
top: 113px;
width: 4px;
height: 4px;
}
#lEye {
left: 100px;
}
#rEye {
left: 150px;
}
#lDot {
left: 118px;
}
#rDot {
left: 153px;
}

document.onmousemove = moveHandler;
function moveHandler(evt) {
if (!evt) {
evt = window.event;
}
animateEyes(evt.clientX, evt.clientY);
}
function animateEyes(xPos,yPos) {
var rightEye = document.getElementById("rEye");
var leftEye = document.getElementById("lEye");
var rightEyeball = document.getElementById("rDot").style;
var leftEyeball = document.getElementById("lDot").style;
leftEyeball.left = newEyeballPos(xPos, leftEye.offsetLeft);
leftEyeball.top = newEyeballPos(yPos, leftEye.offsetTop);
rightEyeball.left = newEyeballPos(xPos, rightEye.offsetLeft);
rightEyeball.top = newEyeballPos(yPos, rightEye.offsetTop);
function newEyeballPos(currPos,eyePos) {
return Math.min(Math.max(currPos,eyePos+3), eyePos+17) + "px";
}
}

Cursor Coordinates