function MM_nbGroup(event, grpName) 
{
	var i,img,nbArr,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]; img.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];
      			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") 
	{
    		if ((nbArr = document[grpName]) != null)
      		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];
			nbArr[nbArr.length] = img;
  		} 
	}
}