var cgt = {};
cgt.trim = function(s) {
	return s.replace(/^\s*|\s*$/g, "");
}

function chkFbForm() {
	var form = document.getElementById("log_form");
	var name = cgt.trim(form.elements["name"].value);
	var password = cgt.trim(form.elements["password"].value);
	var getcode = cgt.trim(form.elements["getcode"].value);

	if ( name == "" ) {
		alert("登录名字不能为空!");
		return false;
	}

	if ( password == "" ) {
		alert("请输入密码!");
		return false;
	}

	if ( getcode == "" ) {
		alert("请输入验证码!");
		return false;
	}
	return true;
}

function chkFbWriteForm() {
	var form = document.getElementById("fb_write_form");
	var title = cgt.trim( form.elements["title"].value);
	var type = "",
		arr = form.elements["type"];
	for (var i=0; i< arr.length; i++) {
		if (arr[i].checked)
			type = arr[i].value;
	}
	var content = cgt.trim( form.elements["content"].value);
	var getcode = cgt.trim(form.elements["getcode"].value);

	if (title == "" ) {
		alert("请输入标题!");
		return false;
	}

	if (type == "" ) {
		alert("请选择留言类型!");
		return false;
	}

	if (content == "" ) {
		alert("请输入内容!");
		return false;
	}

	if (getcode == "" ) {
		alert("请输入验证码!");
		return false;
	}

	return true;
}