function dologin(type)
{
	var form = document.loginform;
	form.logintype.value = type;
	if (form.loginuser.value=="" || form.loginpass.value=="" || form.randomcode.value=="" )
	{
		alert("用户名/密码/验证码均不能为空！");
		return false;
	}else{
		setCookie("sso_username", form.loginuser.value);
		form.submit();
		form.loginpass.value="";
		form.randomcode.value="";
		randomcode();
	}
}
function initlogin()
{
	var form = document.loginform;
	var c = getCookie("sso_username");
	if (typeof(c)!="undefined" && c!=null){form.loginuser.value=c;}
}
function $(id){return document.getElementById(id);}
function random(length)
{
	var seed = new Array('0','1','2','3','4','5','6','7','8','9');
	var idx,i;
	var result = '';
	for (i=0; i<length; i++)
	{
		idx = Math.floor(Math.random()*10);
		result += seed[idx].substr(Math.floor(Math.random()*(seed[idx].length)), 1);
	}
	return result;
}
function randomcode()
{
	$("divcode").innerHTML = "";
	$("hidecode").value = "";
	$("randomcode").value = "";
	var code = random(4);
	$("divcode").innerHTML = code.bold().fontsize(3);
	$("hidecode").value = code;
}
//window.onload = randomcode;
initlogin();
randomcode();