function show_send(id){
	if (document.getElementById("send_lay").style.display==""){
		document.getElementById("send_lay").style.display="none";
	}else{
		document.getElementById("send_lay").style.display="";
		document.send_form.id.value = id;
	}
	
}
function check_send(){
	if (document.send_form.send_name.value==""){
		alert("請輸入您的姓名");
		document.send_form.send_name.select();
		return;
	}
	if (document.send_form.send_email.value==""){
		alert("請輸入您的Email");
		document.send_form.send_email.select();
		return;
	}
	if (chkemail(document.send_form.send_email.value)==0){
		alert("Email格式錯誤!");
		document.send_form.send_email.focus();
		return;
	}
	if (document.send_form.friend_email1.value=="" && document.send_form.friend_email2.value=="" && document.send_form.friend_email3.value==""){
		alert("請至少輸入一位好友的Email");
		document.send_form.friend_email1.select();
		return;
	}
	if (document.send_form.friend_email1.value!="" && chkemail(document.send_form.friend_email1.value)==0){
		alert("Email格式錯誤!");
		document.send_form.friend_email1.focus();
		return;
	}
	if (document.send_form.friend_email2.value!="" && chkemail(document.send_form.friend_email2.value)==0){
		alert("Email格式錯誤!");
		document.send_form.friend_email2.focus();
		return;
	}
	if (document.send_form.friend_email3.value!="" && chkemail(document.send_form.friend_email3.value)==0){
		alert("Email格式錯誤!");
		document.send_form.friend_email3.focus();
		return;
	}
	document.send_form.submit();
}
function chkemail(a){
   re = /^[^\s]+@[^\s]+\.[^\s]{2,3}$/;
   if (re.test(a)){
      return 1;
   }else{
      return 0;
   }
}