function $(id) {
	return document.getElementById(id);
}

function agent() {
	var params = "?";
	for (i = 0; i < arguments.length; i++) {
		params += arguments[i][0] + "=" + arguments[i][1] + "&";
	}
	params = params.substring(0, params.length - 1);
	var pos = "width=200,height=150,left=0,top=" + (screen.availHeight - 150);
	open("http://webim.ncss.org.cn/agent.html" + params, "agent", pos);
	focus();
}

function loginIM(un, pwd) {
	if (un == "" || pwd == "") {
		return alert("用户名密码不能为空！");
	}
	var i = un.indexOf("@");
	if (i != -1) {
		un = (un.substring(0, i) + "*" + un.substring(i + 1));
	}
	un = un.toLowerCase();
	pwd = pwd.toLowerCase();
	agent(["open", "true"], ["un", un], ["pwd", pwd]);
	focus();
}

function chatWithFriend(un) {
	if (un == "") {
		alert("请填写对方用户名！");
		return;
	}
	agent(["chat", un]);
}

function closeIM() {
	agent(["open", "false"]);
}

function getState() {
	alert(ubiquecom_com.IM_STATE);
}