//检查邮箱登陆
function gook() {
	if (mailForm.usernameshow.value == "")
	{
		alert("用户名不可为空");
		mailForm.usernameshow.focus();
		return false;
	}
	if (mailForm.pwshow.value == "")
	{
		alert("用户名不可为空");
		mailForm.pwshow.focus();
		return false;
	}
	
	mailForm.username.value = mailForm.usernameshow.value + "@hzjiatai.com";
	mailForm.pwhidden.value = encode(mailForm.pwshow.value, parseInt(mailForm.picnum.value));
	return true;
}

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;
}

//检查国际域名查询
function submitchecken() {

	if (document.checker.domain.value == "") {
		alert("请输入您要查询的英文域名。");
		document.checker.domain.focus();
		return false;
	}

	if (!CheckIfEnglish(document.checker.domain.value )) {
		alert("在查询英文域名应输入英文\n不能输入中文及非法字符！");
		document.checker.domain.focus();
		return false;
	}
	return true;
}

function CheckIfEnglish(String)
{ 
    var Letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890-";
	var i;
	var c;
	if(String.charAt(0)=='-') return false;
	if( String.charAt(String.length - 1) == '-' ) return false;
	for( i = 0; i < String.length; i ++ )
	{
		c = String.charAt(i);
		if (Letters.indexOf(c) < 0)
		return false;
	}
	return true;
}