js的兼容性问题

//window.event    

IE：有window.event对象    

FF：没有window.event对象。可以通过给函数的参数传递event对象。如onmousemove=doMouseMove(event) 

解决方法：var event = event || window.event;  

example:

<script>

function test(event) {

var event = event || window.event;

//do Something

       }

</script>

<input type="button" value="click" onclick="test(event)"/>