function _doOpenClose(pImg)
{
	if (typeof pImg == "undefined") { return };

	var lDisplay="";
	if (pImg.src.toLowerCase().indexOf("closedirectory") != -1) {
		pImg.src=pImg.src.replace(/close/, "open");
		lDisplay="";
	} else {
		pImg.src=pImg.src.replace(/open/, "close");
		lDisplay="none";
	}
	var lType = pImg.getAttribute("_type_");
	_setRowsByType(lType,lDisplay);
}

function _setRowsByType( pType, pAction )
{
	var lARows=document.getElementsByTagName("tr");
	var lLen = lARows.length;
	for (var i=0;i<lLen;i++) {
		if (lARows[i].getAttribute && lARows[i].getAttribute("_type_") == pType) {
			lARows[i].style.display=pAction;
		}
	}
}