function set_tabs () {
	var loc = location.href;
//	alert(loc.substring(0,43));
	if (loc.substring(0,42) == 'http://www.icpsr.umich.edu/MDRC/about.html')
	{
		var tab = document.getElementById('t01');
		tab.id = 'current';
	}
	else if (loc.substring(0,41) == 'http://www.icpsr.umich.edu/MDRC/data.html')
	{
		var tab = document.getElementById('t02');
		tab.id = 'current';
	}
	else if (loc.substring(0,40) == 'http://www.icpsr.umich.edu/MDRC/das.html')
	{
		var tab = document.getElementById('t03');
		tab.id = 'current';
	}
	else if (loc.substring(0,42) == 'http://www.icpsr.umich.edu/MDRC/sites.html')
	{
		var tab = document.getElementById('t04');
		tab.id = 'current';
	}
	else if (loc.substring(0,41) == 'http://www.icpsr.umich.edu/MDRC/list.html')
	{
		var tab = document.getElementById('t05');
		tab.id = 'current';
	}
	else if (loc.substring(0,42) == 'http://www.icpsr.umich.edu/MDRC/tools.html')
	{
		var tab = document.getElementById('t06');
		tab.id = 'current';
	}
}