function determineActiveTab(displayRelatedBoxFlag)
{
	var searchResult = -1;
	var qString = new String();
	qString = getQString();

	if (qString.length > 0)
	{ 
		var wrkString = new String();
		wrkString = qString.toLowerCase();

		var searchString = "ref=calc";
		searchResult = wrkString.search(searchString);
	}		
	
	if (searchResult > -1)
	{
		switchid('a1');
		resetTabs();
		showdiv('ayd_text');
		hidediv('lie_text');
		if (displayRelatedBoxFlag == null)
		{
			showdiv('aydrelatedBox');
			hidediv('lierelatedBox');
		}
		calculateDefaults();
	}
	else
	{
		switchid('a2');
		resetTabs();
		showdiv('lie_text');
		hidediv('ayd_text');
		if (displayRelatedBoxFlag == null)
		{
			showdiv('lierelatedBox');
			hidediv('aydrelatedBox');
		}
	}
}