function mail_button(){
	var txt=document.getElementById("txt").value;
	var selElm=document.getElementById("select");
	var domain=selElm.options[selElm.selectedIndex].text;

	var ck = mail_check(txt+'@'+domain);
	if(ck){
		script_open("./mob/mail.php","POST",true,"em="+txt+"@"+domain);
	}else{
		alert('メールアドレスが正しくありません。');
	}
}
function mail_check(str){
/*	if (!str.match(/^[A-Za-z0-9]+[\w-]+@[\w\.-]+\.\w{2,}$/)){*/
	if (!str.match(/^[\w-\.]+@[\w\.-]+\.\w{2,}$/)){
		return false;
	}
	return true;
}
function script_open(url,method,async,prm) {
	var request = createHttpRequest();
	request.onreadystatechange = function() {
		if (request.readyState == 4 && request.status == 200) {
/*			var res = decodeURI(request.responseText);*/
			alert('メールを送信しました。');
		}
	}
	request.open(method, url, async);
	request.setRequestHeader('Content-Type','application/x-www-form-urlencoded; charset=UTF-8');
	request.send(prm);
}