function staff_category(ctg){
	var spanNum = document.getElementsByClassName("category_link");
	var ctgName = new Array("STYLIST","ASSISTANT","NAILIST","ESTHETICIAN","cate5","cate6","cate7","cate8","cate9","cate10");

	if(ctg == undefined){
		ctg = ctgName[0];
	}

	for(var i=0; i<ctgName.length ; i++){
		if($(ctgName[i]) != undefined){

			$(ctgName[i]).style.display = 'none';

			if(ctgName[i] == ctg){

				$(ctgName[i]).style.display = 'block';

			}
			
		}

	}
}