function loginform(locate)
{
    var cookiename=sketch("cookiename");
		var dl1 = document.createElement("dl") ;
		dl1.className = "loginFrame" ;
		dl1.id = "loginformFrame";
		var dt2 = document.createElement("dt") ;
		dt2.innerHTML = "<span onclick=\"byid('loginformFrame').style.display='none'\">关闭</span>用户登录" ;
	  var dd3 = document.createElement("dd") ;
		dd3.innerHTML = "<input name=name id=loginName type=text/ value="+cookiename+"><label>用户名：</label>";
		var dd4 = document.createElement("dd") ;
		dd4.innerHTML = "<input name=password id=loginPass type='password'/><label>密　码：</label>";
		var dt5 = document.createElement("dt") ;
		dt5.innerHTML = "&nbsp;<input type=submit value='登录' onclick=login()>&nbsp; <a href='http://www.hlgnet.com/user/findpass.php' target=_blank>忘记密码</a>&nbsp; <a href='http://www.hlgnet.com/user/reg.php' target=_blank>注册用户</a>";
  	var dt6 = document.createElement("dt") ;
		dt6.innerHTML = "<img src=http://images.hlgnet.com/images/c.gif height=10>";
    dl1.appendChild(dt2) ;
	  dl1.appendChild(dd3) ;
		dl1.appendChild(dd4) ;
		dl1.appendChild(dt5) ;
  	dl1.appendChild(dt6) ;
		byid('loginformform').appendChild(dl1);
		if(locate){    
		byid("loginformFrame").style.left=document.body.scrollLeft+screen.availWidth/2-80;
    byid("loginformFrame").style.top=document.body.scrollTop+screen.availHeight/2-150;
     }else{
    byid("loginformFrame").style.left=document.body.scrollLeft+screen.availWidth-340;
    byid("loginformFrame").style.top='3px';}
    byid("loginformFrame").style.display = "block";
}


function login(){ 
	var username=sketch("loginName");
	var userpass=sketch("loginPass");
	if(username == ''){
		alert('请输入用户名！') ;
		return false ;
	}
	
if(userpass == ''){
		alert('请输入密码！') ;
		return false ;
	}
	var url = '/logint.php';
	var callback = loginok;
	var data = "name=" +username+ "&password=" +userpass ;
	Request.reSend(url,data,callback);
}
function loginok(httpObj){ 
	var username = httpObj.responseText ; 
	if(username==0){alert("用户名或者密码错误！");return false;}
	else{	byid("loginarea").innerHTML =username;	}
  byid("loginformFrame").style.display = "none";
}

function logout()
{
	var callback = logoutok;
	var url = '/logout.php';
	var data =  "";
	Request.reSend(url,data,callback);
}

function logoutok()
{
byid("loginarea").innerHTML ="<b><a href=\"javascript:void(0)\" onclick=\"loginform(0)\"><span id=logint><font color=#FF6600>登录网站</font></span></a>&nbsp; <a href=\"http://www.hlgnet.com/user/reg.php\"><font color=#0033FF>用户注册</font></a></b><input id=\"cookiename\" type=\"hidden\" name=\"cookiename\" value=\"\" />";

}