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function getRealHeight(node) {
// returns the real nodeheight, also taken into account absolute or relative divs that float above the node
    var startY = parseInt(node.getY(), 10);
    var finalY = parseInt(node.get('offsetHeight'), 10) + startY;
    var childList = node.all('DIV');
    var listSize = childList.size();
    var i, childNode, position, childY;
    for (i=0; i<listSize; i++) {
        childNode = childList.item(i);
        position = childNode.getStyle('position');
        if ((position==='absolute') || (position==='relative')) {
           childY = parseInt(childNode.get('offsetHeight'), 10) + parseInt(childNode.getY(), 10);
           if (childY>finalY) {finalY=childY;}
        }
    }
    return finalY-startY;
}