function MM_nbGroup(event, grpName) { //v6.0
	/* Functions that swaps down images. */
	var i;
	var img;
	var nbArr;
	var args=MM_nbGroup.arguments;
	if (event == "init" && args.length > 2) {
		if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
			img.MM_init = true;
			img.MM_up = args[3];
			mg.MM_dn = img.src;
			if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
			nbArr[nbArr.length] = img;
			for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
				if (!img.MM_up) {
					img.MM_up = img.src;
					img.src = img.MM_dn = args[i+1];
					nbArr[nbArr.length] = img;
				}
			}
		}
	} else if (event == "over") {
		document.MM_nbOver = nbArr = new Array();
		for (i=1; i < args.length-1; i+=3) {
			if ((img = MM_findObj(args[i])) != null) {
				if (!img.MM_up) img.MM_up = img.src;
				img.src = (img.MM_dn && args[i+2]) ? args[i+2] : ((args[i+1])?args[i+1] : img.MM_up);
				nbArr[nbArr.length] = img;
			}
		}
	} else if (event == "out" ) {
		for (i=0; i < document.MM_nbOver.length; i++) { img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
	} else if (event == "down") {
		nbArr = document[grpName];
		if (nbArr) for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
		document[grpName] = nbArr = new Array();
		for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
			if (!img.MM_up) img.MM_up = img.src;
			img.src = img.MM_dn = (args[i+1])? args[i+1] : img.MM_up;
			nbArr[nbArr.length] = img;
		} }
}