function check()
//用来验证用户登录
{
  if(document.form1.txtUser.value=="")
    {
      alert("用户名不能为空！");
      document.form1.txtUser.focus();
      return false;
    }
    
  if(document.form1.txtPassword.value=="")
    {
      alert("密码不能为空！");
      document.form1.txtPassword.focus();
      return false;
    }
}

function checksearch()
//大搜索查询验证
{
	var f=document.fmSearch;
	if(f.KeyWord.value=="")
	{
		alert("关键字不能为空！");
		return false;
	}
	return true;
}

function gook() {
//邮箱登录验证
	if (usernameshow.value == "")
	{
		alert("用户名不能为空！");
		usernameshow.focus();
		return ;
	}

	if (pwshow.value == "")
	{
		alert("密码不可为空！");
		pwshow.focus();
		return ;
	}
	f1.saveUser.value = "0";
	f1.username.value = usernameshow.value;

	f1.SecEx.value = "1";
	f1.pwhidden.value = encode(pwshow.value, parseInt(f1.picnum.value));

	f1.submit();
}

function Resetmail() {
//清空邮箱所填内容
	usernameshow.value = ""
	pwshow.value = ""
	usernameshow.focus();
}

function encode(datastr, bassnum) {
	var tempstr;
	var tchar;
	var newdata = "";

	for (var i = 0; i < datastr.length; i++)
	{
		tchar = 65535 + bassnum - datastr.charCodeAt(i);
		tchar = tchar.toString();

		while(tchar.length < 5)
		{
			tchar = "0" + tchar;
		}

		newdata = newdata + tchar;
	}

	return newdata;
}