javascript IE与FireFox 一些兼容写法 （小技巧七)

1>获取控件用document.getElementById，不用document.all（FF等浏览器不支持）
2><button> 会被firefox解释为提交form或者刷新页面,需要写标准<button type="button">
3>使用childNode()代替之前的children 
4> 手型鼠标指针请用cursor:pointer，不用 cursor:hand
5>获取自己定义的属性 用  document.getElementByID("TD1").getAttribute("isOBJ")  代替document.getElementByID("TD1").isOBJ
6>事件追加方法attachEvent(IE)/detachEvent;addEventListener( Mozilla, Netscape, Firefox)/removeEventListener
  又或者直接用obj.onmouseover=func;
7>Firefox中不存在 Event时间,必须通过object本身去取
   在Firefox获取当前物件的坐标方法：
  document.onmousemove = Inti_move;
  function  Inti_move(ert)
{
  x=ert.pageX;
}

表4 Mozilla与IE之间的事件属性差异

Internet Explorer Name	Mozilla Name	Description
altKey	altKey	Boolean property that returns whether the alt key was pressed during the event.
cancelBubble	stopPropagation()	Used to stop the event from bubbling farther up the tree.
clientX	clientX	The X coordinate of the event, in relation to the element viewport.
clientY	clientY	The Y coordinate of the event, in relation to the element viewport.
ctrlKey	ctrlKey	Boolean property that returns whether the Ctrl key was pressed during the event.
fromElement	relatedTarget	For mouse events, this is the element from which the mouse moved away.
keyCode	keyCode	For keyboard events, this is a number representing the key that was pressed. It is 0 for mouse events.
returnValue	preventDefault()	Used to prevent the event's default action from occurring.
screenX	screenX	The X coordinate of the event, in relation to the screen.
screenY	screenY	The Y coordinate of the event, in relation to the screen.
shiftKey	shiftKey	Boolean property that returns whether the Shift key was pressed during the event.
srcElement	target	The element to which the event was originally dispatched.
toElement	currentTarget	For mouse events, this is the element to which the mouse moved.
type	type	Returns the name of the event.

8>event.keyCode的問題解決
在FF中不存在window.event.keyCode屬性。可以用以下方法解決

function  keepKeyNum(evt)
{
        var  k=window.event?evt.keyCode:evt.which;
        if ((k<=57) && (k>=48))
                {return true;}
        else 
                {return false;}
}

  < input  type ="text"  onKeyPress =" return keepKeyNum(event);"   >