javascript控制鼠标中键滑动
MouseWheel.js的代码如下：
var MouseWheel_Count=0; function MouseWheel$handle(delta){ ????MouseWheel_Count++; ????if(MouseWheel_Count>1)?? return; ????if (delta < 0) //小于0向下滚动，大于0向上滚动 ???????//??????? alert("向下滚动"); ????else????????//??????? alert("向上滚动"); ????setTimeout("MouseWheel$CountMinus();",500); } ??function MouseWheel$CountMinus() { ????MouseWheel_Count=0; } ??/** 事件句柄 ?*/function MouseWheel$wheel(event){ ????var delta = 0; ????if (!event) /* For IE. */?????????event = window.event; ????if (event.wheelDelta) { /* IE或者Opera. */????????????delta = event.wheelDelta/120; //??????? delta = event.wheelDelta; ????????/** 在Opera9中，事件处理不同于IE ?????????*/????????if (window.opera)? ????????????delta = -delta; ????} ????else?????????if (event.detail) { /** 兼容Mozilla. */????????????/** In Mozilla, sign of delta is different than in IE. ?????????* Also, delta is multiple of 3. ?????????*/????????????delta = -event.detail / 3; ????????} ????/** 如果 增量不等于0则触发 ?????* 主要功能为测试滚轮向上滚或者是向下 ?????*/????if (delta)? ????????MouseWheel$handle(delta); }?
前台调用：
script type="text/javascript">
??? /**author:李伟鹏 date:2011-05-11
??? **鼠标中键滑动控制地图缩放
??? **/
??? /** 初始化 */
??? if (window.addEventListener)
??? /** Mozilla的基于DOM的滚轮事件 **/
??????? window.addEventListener('DOMMouseScroll', MouseWheel$wheel, false);
??? /** IE/Opera. */
??? window.onmousewheel = document.onmousewheel = MouseWheel$wheel;
</script>
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