请教高手：当鼠标指针移动速度太高时，能不能限制它去触发（onMouseOver,onMousemove）事件？

一般速度都可以,极高速不行.我做了试验证明理论成立.
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
.a1{color:#0000FF;}
.a2{color:#FF0000;}
</style>
</head>
<body>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
<div class="a1" onmouseover="this.className='a2'">1111111111</div>
</body>
</html>