var initialsubj=""; 
var initialmsg="我想介紹你看這一篇好文章: "+top.location;
var good;

function checkEmailAddress(field) {
	var goodEmail = field.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\.info)|(\.sex)|(\.biz)|(\.aero)|(\.coop)|(\.museum)|(\.name)|(\.pro)|(\..{2,2}))$)\b/gi);
	if (goodEmail) {
		good = true;
	}else {
		alert('請輸入您朋友的有效電子信箱');
		good = false;
   }
}

function mailThisUrl() {
		good = false
		checkEmailAddress(document.eMailer.email);
		if (good) {
			window.location = "mailto:"+document.eMailer.email.value+"?subject="+initialsubj+"&body="+initialmsg;
   	}
}