function openNewsWin(url,winName, showprompt)
{
    var h = 400;
    var t = (screen.availHeight - h ) /2 ;
    var w = 620;
    var l = (screen.width - w ) /2 ;
    if (showprompt == 'True')
		if (confirm('Θέλετε να συνεχίσετε;') == false)
			return;
	myWin = window.open(url,winName, "scrollbars=yes,resizable=no,status=yes,toolbar=no,location=no,top=" + t + ",height=" + h + ",left=" + l + ",width=" + w)
	if (myWin != null)
		myWin.focus();

}