var good;
function checkEmailAddress(field) 
{
	var goodEmail = field.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi);
	if (goodEmail)
	{
   		good = true;
	} 
	else 
	{
   		alert('Adres e-mail jest nieprawidlowy');
   		field.focus();
   		field.select();
   		good = false;
   	}
}

u = window.location;
m = "Znalazłem/am ciekawą strone w internecie. Musisz zobaczyć!!!";
function mailThisUrl()
{
	good = false
   	checkEmailAddress(document.eMailer.address)
   	if (good)
	{
      		window.location = "mailto:"+document.eMailer.address.value+"?subject="+m+"&body="+document.title+" "+u;
   	}
}