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| <!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"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>鼠标滚轮事件</title> <style type="text/css"> div{ width: 100px;height: 100px;background: red} </style> </head> <script type="text/javascript">
window.onload = function() { function addEvent(element, type, fn) { if(element.addEventListener) { element.addEventListener(type, fn, false); } else if (element.attachEvent) { element.attachEvent('on' + type,fn); } else { element['on' + type] = fn; } } var oDiv = document.getElementById('div'); addEvent(oDiv, 'mousewheel', mousewheel); addEvent(oDiv, 'DOMMouseScroll', mousewheel); function mousewheel(event) { var event = event || window.event; var bDown = true;
bDown = event.wheelDelta?event.wheelDelta < 0 : event.detail > 0; if (bDown) { oDiv.style.height = oDiv.offsetHeight + 10 + 'px'; }else{ oDiv.style.height = oDiv.offsetHeight - 10 + 'px'; } if (event.preventDefault) { event.preventDefault(); } else { event.returnValue = false; } } } </script> <body> <div id="div"></div> </body> </html>
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