function check(theForm)
 {
   if (document.getElementById("username").value == "")
     {
       alert("請輸入姓名!");
       document.getElementById("username").focus();
       return (false);
     }


   if (document.getElementById("usermail").value == "")
     {
       alert("請輸入您的電子郵件!");
       document.getElementById("usermail").focus();
       return (false);
     }

   if (document.getElementById("userquest").value == "")
     {
       alert("請輸入您的需求!");
       document.getElementById("userquest").focus();
       return (false);
     }

   //if (document.getElementById("check_num").value == "")
   //  {
   //    alert("請輸入檢核碼!");
   //    document.getElementById("check_num").focus();
   //    return (false);
   //  }
   if (document.getElementById("usermail").value != "" &&  ! /^[_\.\d\w\-]+@([\d\w][\d\w\-]+\.)+[\w]{2,3}$/.test(theForm.usermail.value))
    {
      alert("請輸入正確的 E-mail !");
      document.getElementById("usermail").focus();
      return (false);
    }
 return (true);
}
function ck_reg()
{
	var pro1     = document.getElementById("pro1");
	var pro3     = document.getElementById("pro3");
	var oth_model= document.getElementById("oth_model");
	var m_num    = document.getElementById("m_num");
	var date     = document.getElementById("date");
	var buy_name = document.getElementById("buy_name");
	var tel      = document.getElementById("tel");
	var c_name   = document.getElementById("c_name");





  if(pro1.value=="0" && oth_model.value==""){
    alert("請選擇產品品名");
    pro1.focus();
    return (false);
  }

  if(pro3.value=="0" && oth_model.value==""){
    alert("請選擇產品型號");
    pro3.focus();
    return (false);
  }

  if(m_num.value==""){
    alert("請填寫機號");
    m_num.focus();
    return (false);
  }

  for(var i = 0; i < m_num.value.length; i++){
   	var p = m_num.value.charAt(i);
    if(!((p >= "A" && p <= "Z")||(p >= "0" && p <= "9") || (p == "-"))){
	    alert("機號請輸入英文A-Z，數字0-9");
	    m_num.focus();
	    return false;
	  }
  }


  if(date.value==""){
    alert("請選擇日期");
    date.focus();
    return (false);
  }

  if(buy_name.value==""){
    alert("請填寫姓名");
    buy_name.focus();
    return (false);
  }

  if(tel.value==""){
    alert("請填寫聯絡電話");
    tel.focus();
    return (false);
  }

  if(c_namevalue==""){
    alert("請填寫購買經銷商");
    c_name.focus();
    return (false);
  }
}

function ck_agency()
{
	var login  = document.getElementById("login");
	var paswd  = document.getElementById("paswd");
  if((login.value.length < 4) || (login.value > 15)){
     alert("請輸入4碼～15碼的帳號");
     login.focus();
     return false;
  }
  if((paswd.value.length < 4) || (paswd.value > 15)){
     alert("請輸入4碼～15碼的密碼");
     paswd.focus();
     return false;
  }
}

function ck_pro_search()
{
	var product_search  = document.getElementById("product_search");
  if(product_search.value==""){
     alert("請輸入關鍵字");
     product_search.focus();
     return false;
  }

}

var isIE = document.all?true:false;
var isNS = document.layers?true:false;
function onlyDigits(e) {
var _ret = true;
if (isIE) {
  if (window.event.keyCode < 48 || window.event.keyCode > 57) {
    window.event.keyCode = 0;
    _ret = false;
  }
}
if (isNS) {
  if (e.which < 48 || e.which > 57) {
    e.which = 0;
    _ret = false;
  }
}
return (_ret);
}