function check_submit(){
  if (document.loginform.user_phone.value == "") {
     alert("請填上手機號碼");
  }else if (document.loginform.user_password.value == ""){
	 alert("請填上密碼");
  }else{
     document.loginform.submit();
  }
}
function check_download(){
	if (document.downloadform.pcode.value=="") {
		alert("請填上產品編號");
	}else { 
		launch('ProductDownload','400','400','b5_download.php?pcode='+escape(document.downloadform.pcode.value)+'&phone='+escape(document.downloadform.phone.value));
	}
}