JavaScript Reference/Javascript Properties/wheelDelta
"wheelDelta" Example
<html>
<body>
<p>
Move mouse wheel on top of the image</p>
<img id="yourimage"
src="http://www.wbex.ru/style/logo.png"
onmousewheel="alert("Wheel Delta: " + event.wheelDelta);">
</body>
</html>
"wheelDelta" is applied to
+----------------+--------------------------------------------------------------+
| Applied_To |event |
+----------------+--------------------------------------------------------------+
"wheelDelta" Syntax and Note
Note:
Read-only property.
Returns a value of
120 if the mouse wheel is rotated up
-120 if it is rotated down.
Syntax:
window.event.wheelDelta