function xrcl(obj,base,id) {
	if (arguments.length < 3) return; 
	var ncl = base + id;	var ocl;
	(id == 0) ? (ocl=base+'1') : (ocl=base+'0');
    obj.className=obj.className.replace(ocl,ncl);	
}
function xrcl2(obj,base,id0,id1) {
	if (arguments.length < 4) return; 
	var ncl = base + id1;	var ocl;
	var ocl = base + id0;
    obj.className=obj.className.replace(ocl,ncl);	
}

function xrcl0(obj,ocl,ncl) {
	if (arguments.length < 3) return; 
    obj.className=obj.className.replace(ocl,ncl);	
}