function IsNull(str)
{
	return (str.replace(/^\s+|\s+$/g,"")=="");
}
function check0()
{
	if (IsNull(document.getElementById("username").value))
	{
		alert("Please input your E-mail!");
		document.getElementById("username").focus();
		return false;
	}
	var email=document.getElementById("username");
  if(email.value.length!=0)
  {
    if(email.value.charAt(0)=="."||email.value.charAt(0)=="@"||email.value.indexOf('@',0)==-1||email.value.indexOf('.',0)==-1||email.value.lastIndexOf("@")==email.value.length-1||email.value.lastIndexOf(".")==email.value.length-1)
    {
      alert("Email address format is not correct! ");
      email.focus();
      return false;
    }
  }
  else
  {
    alert("Email not empty! ");
    email.focus();
    return false;
  }
}
function check1()
{
	if (IsNull(document.getElementById("pwdkey").value))
	{
		alert("Please input your password answer");
		document.getElementById("pwdkey").focus();
		return false;
	}
}
function check2()
{
	if (IsNull(document.getElementById("new_pass").value))
	{
		alert("Please input your new password!");
		document.getElementById("new_pass").focus();
		return false;
	}
	if (IsNull(document.getElementById("re_pass").value))
	{
		alert("Import confirmation code");
		document.getElementById("re_pass").focus();
		return false;
	}
	if (document.getElementById("new_pass").value!=document.getElementById("re_pass").value)
	{
		alert("Two different input password, please re-entry. ");
		document.getElementById("new_pass").value="";
		document.getElementById("re_pass").value="";
		document.getElementById("new_pass").focus();
		return false;
	}
}
function checkuu()
{
	if(IsNull(document.loginfo.username.value))
	{
		document.loginfo.username.focus();
		alert("please input E-mail!");
		return false;
	}
	var email=document.loginfo.username;
  if(email.value.length!=0)
  {
    if(email.value.charAt(0)=="."||email.value.charAt(0)=="@"||email.value.indexOf('@',0)==-1||email.value.indexOf('.',0)==-1||email.value.lastIndexOf("@")==email.value.length-1||email.value.lastIndexOf(".")==email.value.length-1)
    {
      alert("Email address format is not correct! ");
      email.focus();
      return false;
    }
  }
  else
  {
    alert("Email not empty! ");
    email.focus();
    return false;
  }
	if(IsNull(document.loginfo.password.value))
	{
		document.loginfo.password.focus();
		alert("please input password");
		return false;
	}
/*	if(IsNull(document.loginfo.passcode.value))
	{
		document.loginfo.passcode.focus();
		alert("please input code");
		return false;
	}*/
}