function checkSearchSub(from){

	if(from.company.value =="" && from.sub.value =="" && from.service.value =="0" && from.position.value =="0" ){
		alert("请至少输入一个查询条件！");
		return false
	}else{
		if(/[^0-9]/g.test(from.sub.value)){
			alert("分机号码只能有数字构成！")
			from.sub.focus();
			return false;
		}
	}
}