function CheckData_join(){
	if (document.getElementById('name').value == ""){
		alert("請輸入姓名！");
		document.getElementById('name').focus();
		return false;
	}
	if (document.getElementById('nick').value == ""){
		alert("請輸入暱稱！");
		document.getElementById('nick').focus();
		return false;
	}
	if (document.getElementById('sex').value == "0"){
		alert("請選擇性別！");
		document.getElementById('sex').focus();
		return false;
	}
	if (document.getElementById('birthday').value == ""){
		alert("請輸入生日!");
		document.getElementById('birthday').focus();
		return false;
	}
	if (document.getElementById('tel').value == ""){
		alert("請輸入電話！");
		document.getElementById('tel').focus();
		return false;
	}
	if (document.getElementById('mail').value == ""){
		alert("請確定E-mail！");
		document.getElementById('mail').focus();
		return false;
	}
	if (document.getElementById('address').value == ""){
		alert("請輸入聯絡地址");
		document.getElementById('address').focus();
		return false;
	}
	if (document.getElementById('agree').checked != true){
		alert("請先了解並同意本活動規定!");
		document.getElementById('agree').focus();
		return false;
	}
	document.getElementById('button').disabled = true; 
	document.getElementById('button').value = "送出資料中，請稍後";
	return true;
}