JS。某鼠标滚轮事件。

this.initEvent = function(){
var mousewheelevt=(/Firefox/i.test(navigator.userAgent))? "DOMMouseScroll" : "mousewheel"; //FF doesn't recognize mousewheel as of FF3.x
if (document.attachEvent) //if IE (and Opera depending on user setting)
document.attachEvent("on"+mousewheelevt, this.resizeImages);
else if (document.addEventListener) //WC3 browsers
document.addEventListener(mousewheelevt, this.resizeImages, false);
};
this.removeEvent = function(){
var mousewheelevt=(/Firefox/i.test(navigator.userAgent))? "DOMMouseScroll" : "mousewheel"; //FF doesn't recognize mousewheel as of FF3.x
if (document.detachEvent) //if IE (and Opera depending on user setting)
document.detachEvent("on"+mousewheelevt, this.resizeImages);
else if (document.removeEventListener) //WC3 browsers
document.removeEventListener(mousewheelevt, this.resizeImages);
};