function user_is_exists(user){
	var data=$.ajax({
		type: "get",
		global: false,
		data: "user=" + user + "&rand=" + Math.random(),
		processData: false,
		url: "checkUser.php",
		dateType: "html",
		async: false
	}).responseText;
	if ( data==1 ){
		return 1;
	}else{
		return 0;
	}
}

function member_reg_check(){
	if ( $.trim($("#m_user_name").val())=='' ){
		alert("Please input your e-mail address!");
		$("#m_user_name").focus();
		return false;
	}else if ( $("#m_user_name").val().search(/^[\w\-\.]+[@]{1}([\w\-]+[\.]{1}[\w]+)+$/)==-1 ){
		alert("Your e-mail format is not correct!");
		$("#m_user_name").focus();
		return false;
	}else if ( user_is_exists($("#m_user_name").val())==1 ){
		alert("This e-mail already exists!");
		$("#m_user_name").focus();
		return false;
	}else if ( $.trim($("#m_password").val()).length>30 || $.trim($("#m_password").val()).length<6 ){
		alert("Password should be the length of characters 6-30!");
		$("#m_password").focus();
		return false;
	}else if ( $.trim($("#m_password").val())!=$.trim($("#m_password2").val()) ){
		alert("Re-Enter password is wrong!");
		$("#m_password2").val('');
		$("#m_password2").focus();
		return false;
	}else if ( $.trim($("#m_ask").val()).length>50 || $.trim($("#m_ask").val()).length<2 ){
		alert("Problme should be the length of characters 2-50!");
		$("#m_ask").focus();
		return false;
	}else if ( $.trim($("#m_answer").val()).length>50 || $.trim($("#m_answer").val()).length<2 ){
		alert("Answer should be the length of characters 2-50!");
		$("#m_answer").focus();
		return false;
	}else{
		return member_check();
	}
}
function member_check(){
	if ( $.trim($("#m_first_name").val())=="" ){
		alert("Please input your first name!");
		$("#m_first_name").focus();
		return false;
	}else if ( $.trim($("#m_last_name").val())=="" ){
		alert("Please input your last name!");
		$("#m_last_name").focus();
		return false;
	}else if ( $.trim($("#m_tel").val())=="" ){
		alert("Please input your telephone!");
		$("#m_tel").focus();
		return false;
	}
}