function login(username, password,cookietime) 
{
	var logindiv= $("logindivcontent");
	var forms = {username:$F(username), password:$F(password),cookietime:$F(cookietime)};//$F()返回表单控件的值
	logindiv.innerHTML = "<p align=left>登录中...</p>";
	var url = "../member/memberajaxlogin.php?login=yes";
	var pars = $H(forms);//将对象转换成一个可枚举的和联合数组类似的hash对象
	var par = pars.toQueryString();//username=' '&password=' '；
	var myajax = new Ajax.Request(url, {method:"post", parameters:par, onComplete:showResponse});//实现ajax请求
	return false;
}


function showResponse(Request) 
{
	$("logindivcontent").innerHTML = Request.responseText;
}