function checkVersion()
{
	var userAgent = window.navigator.userAgent.toLowerCase();
	var AppName = "";
	var Version = "";
	var Sys = "";
	if (userAgent.indexOf("msie")>-1) {
		AppName = "msie";	
		Version	= userAgent.replace(/.+msie/gi,"").replace(/;.+/gi,"") - 0;	
	} else if(userAgent.indexOf("firefox")>-1) {
		AppName = "firefox";
		Version = parseFloat(userAgent.replace(/.+firefox\//gi,"").replace(/\(.*\)/g,"")) - 0;
	} else if(userAgent.indexOf("netscape")>-1) {
		AppName = "netscape";
		Version = ParseFloat(userAgent.replace(/.+netscape\//gi,"").replace(/\(.*\)/g,"")) - 0;
	}

	if ((AppName == "netscape") || (AppName == "firefox" && Version < 1.5)) {
		return false;
	} 

	return true;
}


function login_checkAndClear()
{
	var lm_s=login_check();
	var lm_t=null;
	
	if (lm_s)
	{
		lm_t=setTimeout("document.login.reset()",1000);
		//clearTimeout(lm_t);
	} 
	
	return lm_s;
}

function login_check()
{
	if (checkVersion() == false) {
		alert("浏览器版本不支持，请升级到新版本!");
		return false;
	}
	if(document.login.username.value=="")  {
		alert("请输入你的用户名.");
		return false;
	} else if(document.login.username.value.length<1) {
		alert("用户名无效，请重新输入.");
		return false;
	} else if(document.login.username.value.length>30) {
		alert("用户名无效，请重新输入.");
		return false;
	} else if(document.login.password.value=="") {
		alert("请输入你的密码.");
		return false;
	} else if(document.login.password.value.length<2) {
		alert("密码无效，请重新输入.");
		return false;
	} else if(document.login.password.value.length>18){
		alert("密码长度不能超过18位.");
		return false;
	} else  {		
		return true;
	}
}
function getpass() {
  window.open('http://mail.most.gov.cn/cgi-bin/getpass.cgi?lang=gb','','top=100,left=150,width=350,height=200');
}

var username='';
var the_cookie=document.cookie;
var each_cookie=the_cookie.split('; ');  
for(var i=0;i<each_cookie.length;i++) {
    var  each_value=each_cookie[i].split('=');
    if(each_value[0]=='username')
        username=each_value[1];
}
function read_cookie() {
    if(username.indexOf('%40') != -1)    {
        var username_value=username.split('%40')
        document.login.username.value=username_value[0];
        document.login.mail_domain.value=username_value[1];
	}
}

function change_lang(){	
	var selected_option=document.login.lang.selectedIndex;
	switch (selected_option) {
		case 0:
			location.href="http://mail.most.gov.cn/cgi-bin/index.cgi?change_lang=gb";
			break;
		case 1:
			location.href="http://mail.most.gov.cn/cgi-bin/index.cgi?change_lang=big5";
			break;
		case 2:
			location.href="http://mail.most.gov.cn/cgi-bin/index.cgi?change_lang=eng";
			break;
		case 3:
			location.href="http://mail.most.gov.cn/cgi-bin/index.cgi?change_lang=kr";
			break;
	}		
}