// JavaScript Document
/*
function chk_login()
{
	if(document.form_login.username.value=="")
	{
		alert('请填写用户名！');
		document.form_login.username.focus();
		return false;
	}
	if(document.form_login.password.value=="")
	{
		alert('密码不能为空！');
		document.form_login.password.focus();
		return false;
	}
	else
	document.form_login.action="User_ChkLogin.asp"
	document.form_login.submit();
	return true;
}
*/
function check_order()
{
	if(document.OrderSearch.OrderNumber.value=="")
	{
		alert('货品单号不能为空！');
		document.OrderSearch.OrderNumber.focus();
		return false;
	}
	else if(isNaN(document.OrderSearch.OrderNumber.value))
	{
		alert('货品单号必须输入数字！');
		document.OrderSearch.OrderNumber.focus();
		return false;
	}
	else if(document.OrderSearch.OrderDay.value=="")
	{
		alert('购买日期不能为空！');
		document.OrderSearch.OrderDay.focus();
		return false;
	}
	else
	{
		document.OrderSearch.submit();
		return true;
	}

}
function check_product()
{
	if(document.Search.ClassID.value=="")
	{
		alert('请选择分类!');
		document.Search.ClassID.focus();
		return false;
	}
}