function doRollover(pagename, curpage) {
	//changes the table cell bgcolor on rollover
	if (document.getElementById) {  //IE5+ and NS6
		document.getElementById('nb_'+pagename).bgColor = "#5B9BC8";
	} else if (document.layers) {  //NS4
		document.layers['nb_'+pagename].bgColor = "#5B9BC8";
	} else if (document.all) {  //IE4
		document.layers['nb_'+pagename].bgColor = "#5B9BC8";
	}
}
function doRollout(pagename, curpage) {
	//changes the table cell bgcolor on rollout
	if (document.getElementById) {  //IE5+ and NS6
		document.getElementById('nb_'+pagename).bgColor = "#CCCCCC";
		document.getElementById('nb_'+curpage).bgColor = "#5B9BC8";
	} else if (document.layers) {  //NS4
		document.layers['nb_'+pagename].bgColor = "#CCCCCC";
	} else if (document.all) {  //IE4
		document.layers['nb_'+pagename].bgColor = "#CCCCCC";
	}
}