function loginRes()
{
	if (4 ==xmlHttp.readyState )
	{
		resText = xmlHttp.responseText;	
		var res_iframe = document.getElementById("res_iframe");
		if (-1 == resText)
		{
			alert("用户名不存在！");
		}
		else if (-2 == resText)
		{
			alert("密码不正确");
		}
		else
		{
			res_iframe.innerHTML = resText;
		}
		
	}
}

function focusUsername()
{
	var username = document.getElementById("username");
	if (" 用户名" == username.value)
	{
		username.value = "";
		username.style.color = "#000";
	}
}

function focusPassword()
{
	var password = document.getElementById("password");
//	if ("密码" == password.value)
	{
		password.style.backgroundImage = "";
		password.value = "";
		password.style.color = "#000";
	}
}

var currentPic = 0;
function changePic1(id)
{
	var picicon = document.getElementById("icon");
	var piccontent = document.getElementById("swf");
	var divs = piccontent.getElementsByTagName("a");
	var icons = picicon.getElementsByTagName("a");
	for (var i=0; i< divs.length; i ++)
	{
		var am = i+1;
		if (id == am)	
		{
			divs[i].className = "";	
			icons[i].className = "current";
		}
		else
		{
			divs[i].className = "hidden";	
			icons[i].className = "";
		}
	}
	currentPic = id;
	clearInterval(pic1Int);
	pic1Int = setInterval("swfPic1()" , 5000);
}

function swfPic1()
{
	var picicon = document.getElementById("icon");
	var icons = picicon.getElementsByTagName("a");
	if (icons.length == currentPic)
	 currentPic = 0;
	currentPic ++;
	changePic1(currentPic);
}