var olddiv='';
function InstrumentClick(div, file, height)
{
//	var e = document.getElementById(el);
	if (olddiv!='')
	{
		InstrumentReset(olddiv,'');
	}
	olddiv=div;
	var ediv = document.getElementById(div);

//	var ypos = calculateSumOffset(e, 'offsetTop')+e.offsetHeight;
//	ediv.style.top = ypos + 'px';
	//ediv.style.overflow= 'scroll';
	//ediv.style.height = '400px';
	ediv.style.visibility= 'visible';
	ediv.style.display= 'block';

	ediv.innerHTML='<iframe name="instrframe" src="'+file+'" width="490px" height="'+height+'px" frameborder="no" name></iframe><p align="center"><a href="#" onClick="javascript: InstrumentReset(\''+div+'\'); return false;">Sluit venster</a></p>';
}
function InstrumentReset(div, frame)
{
	var ediv = document.getElementById(div);
//	ediv.style.top = '0px';
	//ediv.style.height = '100px';
	ediv.innerHTML='';
	ediv.style.visibility= 'hidden';
	ediv.style.display= 'none';
	olddiv='';
	//ediv.style.overflow= '';
}

function calculateSumOffset(idItem, offsetName)
{
	var totalOffset = 0;
	var item = eval('idItem');
	do
	{
		totalOffset += eval('item.'+offsetName);
		item = eval('item.offsetParent');
	} while (item != null);
	return totalOffset;
}