function isValidname(name)
{
	return /^[\w]{1,50}$/.test( name );
}	
function checkuser(){
		userName = document.getElementById('uname').value;
		document.getElementById('checkUser').style.display = 'block';
		if (userName == "") 
			document.getElementById('checkUser').innerHTML = "请输入用户名！";
		else if (!isValidname(userName))
			document.getElementById('checkUser').innerHTML = "无效用户名！用户名只能使用英文或数字组合！";
		else {
			document.reg.action = "validuser.asp";
			ajaxFormSubmit(document.reg,document.getElementById('checkUser'));
			document.reg.action = "userreg.asp"; /* quick fix - kastone */
   	}
}
function error(String) {
	alert(String);
	return false;
}
function isChecked() {
	if (document.reg.uname.value == '') {
		alert('请输入用户名!');
		return false;
	}
	if (document.reg.password.value == '') {
		alert('请输入密码!');
		return false;
	}
	if (document.reg.password.value.length <6) {
		alert('密码至少为6位!');
		return false;
	}
	if (document.reg.repass.value == '') {
		alert('请再次输入密码!');
	return false;
	}
	
	if (document.reg.password.value != reg.repass.value) {
		alert('两次输入的密码不一样!');
	return false;
	}
	if (document.reg.email.value == '') 
	{
		alert('请输入email!');
	return false;}
	
var myRegExp = /\w+\@[.\w]+/;
  if( !myRegExp.test(reg.email.value) )
  {
   alert("电子邮箱格式错误！");
   return false;
  }	
	if (document.reg.code.value == '') 
	{
		alert('请输入验证码!');
	return false;}
  return true;
}

function checkvote(form)
 {
flag=false;
for(i=0;i<form.voteselect.length;i++){
if(form.voteselect[i].checked){flag=true;break;}
}
if(!flag){alert("请选择投票选项!"); return false;}

}