function popUp( URL, width, height, scrollbars, resizable, posX, posY ) {
day = new Date( );
id = day.getTime( );
features = 'toolbar=0,scrollbars=' + scrollbars + ',location=0,statusbar=0,menubar=0,resizable=' + resizable + ',width=' + width + ',height=' + height + ',screenX=' + posX + ',screenY=' + posY + ',left=' + posX + ',top=' + posY;
eval("page" + id + " = window.open(URL, '" + id + "', '" +  features + "');");
}

function clearField() {
	if ( document.subscribe.addSubcriber.value == "< Your mail address >" || document.all['newsletterText'].value == "Type your mail address here" ) {
		document.subscribe.addSubcriber.value = "";
	}
}

function submitNewsletterForm() {
	var x = document.subscribe.addSubcriber.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if ( filter.test( x ) ) {
		document.subscribe.submit();
	}
	else {
		document.subscribe.addSubcriber.value = "Type your mail address here";
	}
}