function login(){
	var username = document.getElementById("username").value;
	var password  = document.getElementById("password").value;
	if(!password)return;
	if(!username)return;

	var md5username = MD5(username);
	var md5password = MD5(password);

for(i=0; userdb[i]; i++)
	if(md5username == userdb[i] && md5password == passdb[i]){
		document.location.href = username + "/" +  password + ".html";
		return;
	}
	document.location.href = document.getElementById("errorpage").value;
}