丁丁のブロゲ

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function CPos(x, y)

{

    this.x = x;

    this.y = y;

}

function GetObjPos(ATarget)

{

    var target = ATarget;

    var pos = new CPos(target.offsetLeft, target.offsetTop);

    var target = target.offsetParent;

    while (target)

    {

        pos.x += target.offsetLeft;

        pos.y += target.offsetTop;

        target = target.offsetParent;

    }

    return pos;

}