Click Event in IE&FoireFox

Fx can't support "window.event" object. The follow codes will not act in Fx:

<input type="button" name="Button1" value="Button" onclick="javascript:doClick()">
<script language="javascript">
function doClick()
{
     alert(window.event.clientX);
}
</script>

The event in Fx should be send as a parameter of event function. The codes run in both IE and Fx:

<input type="button" name="Button1" value="Button" onclick="javascript:doClick(event)">
<script language="javascript">
function doClick(evt)
{
     alert(evt.clientX);
}
</script>

Notice that: event object in IE has event.x and event.y properties, but to Fx, they are event.pageX and event.pageY. You can use:

mX = event.x ? event.x : event.pageX;

The coordinate to parent object is clientX and clientY. These attributes can use both in IE and Fx.

We offen use [Object].[event]=[function] to define a event function, but in Fx it's a little diffent. So we must detect the explorer type first and then write different codes for it:

var agt=navigator.userAgent.toLowerCase();
var is_IE=(agt.indexOf("msie")!=-1 && document.all);
if(is_IE){
     document.body.onload=InitPage;
}
else{
     document.body.onload=InitPage();
}