function phoneNum(what){
	var out=new Array;
	if(what.search(/\s*\(?(\d{3})?[-\/\.\s\)]*(\d{3})[-\/\.\s]*(\d{4})\s*(?:x|ext?)?\s?(\d*)?\s*/)==0){	
		out.area_code=RegExp.$1;
		out.prefix=RegExp.$2;
		out.last_four=RegExp.$3;
		out.extension=RegExp.$4;
		out.is_valid=true;
	}else{
		out['is_valid']=false;
	}
	return out;
}