function getAbsPoint(event)
{
var x = event.offsetLeft, y = event.offsetTop;
while(event=event.offsetParent)
{
x += event.offsetLeft;
y += event.offsetTop;
}
alert("x:"+x+","+"y:"+y);
}
方法2：
function getAbsPoint(obj)
{
var x,y;
var oRect = obj.getBoundingClientRect();
x=oRect.left
y=oRect.top
alert("("+x+","+y+")")
}
