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<!doctype html>
<html lang="zh-ch">
<head>
<meta charset="utf-8" />
<meta content="IE=8" http-equiv="X-UA-Compatible"/>
<title>mousewheelµÄʼþ°ó¶¨ by ˾ͽÕýÃÀ</title>
<mce:script type="text/javascript"><!--
window.onload = function(){
var eventSupported = function( eventName,el ) {
el = el || document.createElement("div");
eventName = "on" + eventName;
var isSupported = (eventName in el);
if (el.setAttribute && !isSupported ) {
el.setAttribute(eventName, "return;");
isSupported = typeof el[eventName] === "function";
}
el = null;
return isSupported;
};
var addEvent = function(obj,type,callback){
if ( obj.addEventListener ) {
obj.addEventListener( type, callback, false );
} else if ( obj.attachEvent ) {
obj.attachEvent( "on" + type, callback );
}
}
var type = eventSupported("mousewheel") ? "mousewheel":"DOMMouseScroll";
//×¢ÒâIEÏÂwindowûÓйöÂÖʼþ
var wheel = function(obj,callback){
addEvent(obj, type,function(event){
event = event || window.event;
var delta = 0;
if (event.wheelDelta) {
delta = event.wheelDelta/120;
//opera 9xϵÁеĹö¶¯·½ÏòÓëIE±£³ÖÒ»Ö£¬10ºóÐÞÕý
if(window.opera && window.opera.version() < 10)
delta = -delta;
} else if (event.detail) {
delta = -event.detail/3;
}
//ÓÉÓÚʼþ¶ÔÏóµÄÔ­ÓÐÊôÐÔÊÇÖ»¶Á£¬ÎÒÃÇÖ»ÄÜͨ¹ýÌí¼ÓÒ»¸ö˽ÓÐÊôÐÔdeltaÀ´½â¾ö¼æÈÝÎÊÌâ
event.delta = Math.round(delta); //ÐÞÕýsafariµÄ¸¡µã bug
callback.call(obj,event);
});
}
var counterDelta = 0;
wheel(document.getElementById("delta"),function(e){


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/* ·½·¨:Array.remove(dx)
* ¹¦ÄÜ:ɾ³ýÊý×éÔªËØ.
* ²ÎÊý:dxɾ³ýÔªËØµÄϱê.
* ·µ»Ø:ÔÚÔ­Êý×éÉÏÐÞ¸ÄÊý×é
*/
//¾­³£ÓõÄÊÇͨ¹ý±éÀú,ÖØ¹¹Êý×é.
Array.prototype.remove=function(dx)
{
if(isNaN(dx)||dx>this.length){return false;}
for(var i=0,n=0;i<this.length;i++)
{
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