获取鼠标的相对位置
function getMousePosition(event,o)
{
var mousePosition={x:0,y:0};
var top,left,obj;
obj=o;
var ParentObj=obj;
left=obj.offsetLeft;
while(ParentObj=ParentObj.offsetParent){
left+=ParentObj.offsetLeft;
}
mousePosition.x=event.clientX-left+document.body.scrollLeft;
ParentObj=obj;
top=obj.offsetTop;
while(ParentObj=ParentObj.offsetParent){
top+=ParentObj.offsetTop;
}
mousePosition.y=event.clientY-top+document.body.scrollTop;
return mousePosition;
}
///示例：
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
</HEAD>
<BODY style="margin:40px;">
<div style="height:400px;">
ddddddddddddddddddddd
</div>
<div style="height:400px;width:300px;background-color:blue;" onmousemove="tellMSPosition(event,this)">
第一个测试DIV
DIV 定位方式：普通定位
</div>
<div style="background-color:#000000;color:#FFFFFF;width:300px;height:300px;position:absolute;top:280px;left:350px;margin:0px; border:0px;" onmousemove="tellMSPosition(event,this)">
第二个测试DIV<br />
DIV 定位方式：绝对定位<br />
<br />
<br />
当前鼠标坐标为：<br />
mousePosition.X：<span id="mp_x"></span><br />
mousePosition.Y：<span id="mp_y"></span>
</div>
</body>
<script type="text/javascript">
function getMousePosition(event,o)
{
var mousePosition={x:0,y:0};
var top,left,obj;
obj=o;
var ParentObj=obj;
left=obj.offsetLeft;
while(ParentObj=ParentObj.offsetParent){
left+=ParentObj.offsetLeft;
}
mousePosition.x=event.clientX-left+document.body.scrollLeft;
ParentObj=obj;
top=obj.offsetTop;
while(ParentObj=ParentObj.offsetParent){
top+=ParentObj.offsetTop;
}
mousePosition.y=event.clientY-top+document.body.scrollTop;
return mousePosition;
}
function tellMSPosition(event,o)
{
var t=getMousePosition(event,o)
document.getElementById("mp_x").innerHTML = t.x +"px";
document.getElementById("mp_y").innerHTML = t.y +"px";
}
</script>
</BODY>
</HTML>
