function bultenekle() {

	if(document.bulten.Email.value.indexOf ('@',0) < 1 || document.bulten.Email.value.indexOf ('.',0) == -1)  {
		alert("Tragen sie bitte ihre E-mail adresse ein.");
		document.bulten.Email.focus();
	}else {
	    pncr=window.open ("", "bultenwin", "scrollbars=no,status=no,toolbar=no,menubar=no,location=no,resizable=no,left=100,top=100,width=300,height=230");
	    pncr.focus();
	    document.bulten.target = "bultenwin";
	    document.bulten.submit();

	  }
}

var tiksay = 0;
function eposton() {

	if (tiksay == 0) {
		document.bulten.Email.value="";
	}
	tiksay = 1;

}