function MemberLogin(theForm) { 

 if (!checkmail(theForm.LoginID)) {
      return false;
  }


  if ( isNumberCheck(theForm.LoginPwd.value) == false) {
      alert("請輸入使用者密碼！") ;
      theForm.LoginPwd.focus();
      return (false);
  }

}

var NumberCheck = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

function isEmpty(s) {
  return ((s == null) || (s.length == 0))
  }
    
function isNumberCheck(s) {   
    var i;
    var c;

    if (isEmpty(s)) return false;

    for (i = 0; i < s.length; i++) {
     c = s.charAt(i);
     if (NumberCheck.indexOf(c) == -1) return false;
    }

    return true;

}

//檢查 E-mail 格式
function checkmail(mailobj) {

       var i;

       if (mailobj.value=="")    { 
           alert("對不起，你必須輸入帳號(Email)!!");
           mailobj.focus();
           return false;}  
   
     
       if (mailobj.value.indexOf("@") == "-1" || mailobj.value.indexOf(".") == "-1") {
           alert("帳號(E-mail)要填寫正確才可以喔！");
           mailobj.focus();
           return false;
       }else if (mailobj.value.indexOf(" ") != "-1") {
            alert ("帳號(E-mail)不可含有空白");
            mailobj.focus();
            return false;
       }else if (mailobj.value.indexOf("\"") != "-1") {
            alert ("帳號(E-mail)不可含有 \"");
            mailobj.focus();
            return false; }


       for (i = 0;i < mailobj.value.length; i ++) {
           if (mailobj.value.charCodeAt(i) >= 128) {
              alert ("E-mail不可含有中文字");
              mailobj.focus();
              return false;    }
       }


       if (mailobj.value.length >50) {
           alert("E-mail最多單50個字元");
	       mailobj.focus();
	       return false;
	   }

   return true;

}