复制代码 代码如下:
/** Event handler for mouse wheel event.
*鼠标滚动事件
*/
var wheel = function(event) {
var delta = 0;
if (!event) /* For IE. */
event = window.event;
if (event.wheelDelta) { /* IE/Opera. */
delta = event.wheelDelta / 120;
} else if (event.detail) {
/** Mozilla case. */
/** In Mozilla, sign of delta is different than in IE.
* Also, delta is multiple of 3.
*/
delta = -event.detail / 3;
}
/** If delta is nonzero, handle it.
* Basically, delta is now positive if wheel was scrolled up,
* and negative, if wheel was scrolled down.
*/
if (delta)
handle(delta);
/** Prevent default actions caused by mouse wheel.
* That might be ugly, but we handle scrolls somehow
* anyway, so don't bother here..
*/
if (event.preventDefault)
event.preventDefault();
event.returnValue = false;
}
/** Initialization code.
* If you use your own event management code, change it as required.
*/
if (window.addEventListener) {
/** DOMMouseScroll is for mozilla. */
window.addEventListener('DOMMouseScroll', wheel, false);
}
/** IE/Opera. */
window.onmousewheel = document.onmousewheel = wheel;
/** This is high-level function.
* It must react to delta being more/less than zero.
*/
var handle = function(delta) {
var random_num = Math.floor((Math.random() * 100) + 50);
if (delta < 0) {
// alert("鼠标滑轮向下滚动:" + delta + "次!"); // 1
$("btn_next_pic").onclick(random_num);
return;
} else {
// alert("鼠标滑轮向上滚动:" + delta + "次!"); // -1
$("btn_last_pic").onclick(random_num);
return;
}
}
/** Event handler for mouse wheel event.
*鼠标滚动事件
*/
var wheel = function(event) {
var delta = 0;
if (!event) /* For IE. */
event = window.event;
if (event.wheelDelta) { /* IE/Opera. */
delta = event.wheelDelta / 120;
} else if (event.detail) {
/** Mozilla case. */
/** In Mozilla, sign of delta is different than in IE.
* Also, delta is multiple of 3.
*/
delta = -event.detail / 3;
}
/** If delta is nonzero, handle it.
* Basically, delta is now positive if wheel was scrolled up,
* and negative, if wheel was scrolled down.
*/
if (delta)
handle(delta);
/** Prevent default actions caused by mouse wheel.
* That might be ugly, but we handle scrolls somehow
* anyway, so don't bother here..
*/
if (event.preventDefault)
event.preventDefault();
event.returnValue = false;
}
/** Initialization code.
* If you use your own event management code, change it as required.
*/
if (window.addEventListener) {
/** DOMMouseScroll is for mozilla. */
window.addEventListener('DOMMouseScroll', wheel, false);
}
/** IE/Opera. */
window.onmousewheel = document.onmousewheel = wheel;
/** This is high-level function.
* It must react to delta being more/less than zero.
*/
var handle = function(delta) {
var random_num = Math.floor((Math.random() * 100) + 50);
if (delta < 0) {
// alert("鼠标滑轮向下滚动:" + delta + "次!"); // 1
$("btn_next_pic").onclick(random_num);
return;
} else {
// alert("鼠标滑轮向上滚动:" + delta + "次!"); // -1
$("btn_last_pic").onclick(random_num);
return;
}
}
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