一个不用onmouseup的拖动函数

ff下onmousemove鼠标按不按都是1所以就不能这样用了

<SCRIPT LANGUAGE="JavaScript">  
<!--  
    function drag(obj)  
    {  
        var s = obj.style  
        var b = document.body  
        var x = event.clientX + b.scrollLeft - s.pixelLeft  
        var y = event.clientY + b.scrollTop - s.pixelTop  
        var m = function()  
        {  
            if (event.button == 1)  
            {  
                s.pixelLeft = event.clientX + b.scrollLeft - x  
                s.pixelTop = event.clientY + b.scrollTop - y  
            }  
            else document.detachEvent("onmousemove", m)  
        }  
        document.attachEvent("onmousemove", m)

if (!this.z) this.z = 999  
        s.zIndex = ++this.z  
        event.cancelBubble = true  
    }  
//-->  
</SCRIPT>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

一个不用onmouseup的拖动函数_javascript技巧