<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Document</title> <style> #div1{width: 200px;height: 200px;background: red;} </style> <!-- 普通事件：类似onclick 、 onmousedown... DOM事件：DOMMouseScroll DOM事件只能通过绑定来添加 --> <script> function myAddEvent(obj,sEvent,fn) { if(obj.attachEvent) { obj.attachEvent('on'+sEvent,fn); } else { obj.addEventListener(sEvent,fn,false); } } window.onload=function() { var oDiv=document.getElementById('div1'); function onMouseWheel(ev) { var oEvent=ev||event; var bDwon=true; //鼠标滚轮方向是否向下 bDwon=oEvent.wheelDelta?oEvent.wheelDelta < 0:oEvent.detail > 0; // alert(bDwon); if(bDwon) { oDiv.style.height=oDiv.offsetHeight+10+'px'; } else { oDiv.style.height=oDiv.offsetHeight-10+'px'; } if(oEvent.preventDefault) //FF 阻止默认事件（通过事件绑定的） { oEvent.preventDefault(); } return false; }; myAddEvent(oDiv,'mousewheel',onMouseWheel); myAddEvent(oDiv,'DOMMouseScroll',onMouseWheel); }; </script> </head> <body style="height:1000px;"> <div id="div1"></div> </body> </html>