function cssjs(a,o,c1,c2) {
  		switch (a){
  			case 'add':
  		    if(!cssjs('check',o,c1)){o.className+=o.className?' '+c1:c1;}
  			break;
  			case 'remove':
  				var rep=o.className.match(' '+c1)?' '+c1:c1;
  				o.className=o.className.replace(rep,'');
  			break;
  			case 'check':
  				return new RegExp('\\b'+c1+'\\b').test(o.className)
  			break;
  		}
  	}